Official Cambridge Guide 1 Listening Test 1
4 parts · 40 questions · 30 minutes
Preston Park Run enquiry
Questions 1–6
Complete the notes below. Write NO MORE THAN TWO WORDS AND/OR A NUMBER for each answer.
PRESTON PARK RUN
Details of run
Example – Day of Park Run: Saturday
Start of run: in front of the (1) …………………………
Time of start: (2) …………………………
Length of run: (3) …………………………
At end of run: volunteer scans (4) …………………………
Best way to register: on the (5) …………………………
Cost of run: £ (6) …………………………
Questions 7–10
Complete the notes below. Write NO MORE THAN TWO WORDS AND/OR A NUMBER for each answer.
Volunteering
Contact name: Pete (7) …………………………
Phone number: (8) …………………………
Activities: setting up course
(9) ………………………… the runners
(10) ………………………… for the weekly report
Pacton-on-Sea bus tour
Questions 11–14
Complete the table below. Write NO MORE THAN THREE WORDS AND/OR A NUMBER for each answer.
PACTON-ON-SEA BUS TOUR
| Bus stops | Location | Things to see |
|---|---|---|
| Bus stop 1 | train station | start of tour |
| Bus stop 2 | the aquarium | dolphins and (11) ………………………… |
| Bus stop 3 | (12) ………………………… | yachts and power boats |
| Bus stop 4 | (13) ………………………… centre | very old (14) ………………………… |
Questions 15–20
Complete the sentences below. Write NO MORE THAN TWO WORDS AND/OR A NUMBER for each answer.
15. • You need to have a ………………………… to buy a ticket for £10.
16. • The bus tour lasts ………………………… in total.
17. • The cost of the bus ticket includes entrance to the ………………………… .
18. • You can listen to an audio commentary which has been made by the ………………………… .
19. • If the weather is wet, it is a good idea to bring ………………………… .
20. • Don't forget to bring your ………………………… when you book online.
Replacing a college computer system
Questions 21–26
Choose the correct letter, A, B or C.
21. Dave Hadley says that the computer system has
A too many users.
B never worked well.
C become outdated.
22. The main problem with the computer system is that it
A is too slow.
B stops working.
C displays incorrect data.
23. Timetabling has become an issue because
A there is not enough time for anyone to do it.
B the system does not handle course options.
C the courses are constantly changing.
24. To solve the timetabling issues, Randhir suggests that
A students should create their own timetables.
B Dave should have someone to assist him.
C the number of courses should be reduced.
25. Randhir says that a new system may
A need to be trialled.
B still have problems.
C be more economical.
26. Improving the existing system will take
A a few weeks.
B four or five months.
C nine months.
Questions 27–30
Complete the flow-chart below. Write NO MORE THAN TWO WORDS for each answer.
Next steps
Get approval from (27) …………………………
↓
Complete a (28) ………………………… form
↓
Book a (29) ………………………… with the systems analyst
↓
Set up a (30) ………………………… with technologies team
The origins of ceramics
Questions 31–40
Complete the sentences below. Write NO MORE THAN TWO WORDS AND/OR A NUMBER for each answer.
31. • Ceramics date back approximately ………………………… .
32. • The first figurines were made in the area of ………………………… .
33. • Early humans could not use their pots to store ………………………… .
34. • The Chinese improved the quality of ceramics by mixing ………………………… with the clay.
35. • Chinese porcelain was also called ………………………… .
36. • Bottger added quartz and ………………………… to clay to make porcelain.
37. • Glass production is similar to clay ceramics apart from the rate of ………………………… .
38. • The Romans introduced the use of glass to make ………………………… .
39. • The discovery of concrete is probably due to observing reactions of water and ………………………… .
40. • The ability to build large ………………………… contributed to the success of the Roman Empire.
Answers
1. cafe
2. 9 am
3. five kilometres
4. bar code
5. website
6. 1.50
7. MAUGHAN
8. 01444 732900
9. guiding
10. taking photos
11. sharks
12. old fishing village
13. shopping
14. fountain
15. student card
16. fifty minutes
17. museum
18. tourist office
19. rainwear
20. e-ticket
21. become outdated.
22. is too slow.
23. the system does not handle course options.
24. students should create their own timetables.
25. be more economical.
26. four or five months.
27. senior management
28. project request
29. meeting
30. conference call
31. 29,000 years
32. southern Europe
33. water
34. minerals
35. white gold
36. china stone
37. cooling
38. windows
39. volcanic ash
40. harbours
Explanations
- 1. cafe
- The organiser traces the route: 'The run starts at the cafe, goes past the tennis courts then twice around the lake and finishes back where it started.' The start point is the cafe; the tennis courts and the lake are places the route passes, not where it begins.Common trap: Route-sequence trap — three park locations are named in one sentence and only the first is the start.
- 2. 9 am
- 'Well the actual run begins at 9 am but the runners start arriving at about 8.45.' 8.45 is when people turn up, not when the run starts.Common trap: Two-times trap — the arrival time follows the start time in the same sentence.
- 3. five kilometres
- 'Well it used to be three kilometres ... so we lengthened it to five kilometres.' Three kilometres is the old distance and two kilometres is the amount added, so the current length is five kilometres.Common trap: Three-numbers trap — old distance, new distance and the difference are all said in one turn.
- 4. bar code
- 'When you cross the finish line you'll be given a bar code and you take this to one of the run volunteers, who will scan it.' The thing scanned is the bar code.Common trap: Pronoun-reference trap — 'scan it' refers back to the bar code mentioned earlier in the sentence.
- 5. website
- 'I could take your details over the phone but it's much easier if you do it using the website.' 'Much easier' signals the best way, so the phone option is rejected.Common trap: Contrast trap — 'but ... much easier' overturns the option mentioned first.
- 6. 1.50
- 'In fact we have just increased the charge to £1.50.' A pound was the old price and 50p is the increase, not the current cost. Registration itself is free.Common trap: Old-price trap — the previous charge and the size of the rise both follow the answer.
- 7. MAUGHAN
- The caller mishears the surname and the organiser spells it out: 'No - just a bit more complicated - it's M-A-U-G-H-A-N.' The caller's own guess, 'Morn', is wrong.Common trap: Misheard-spelling trap — an incorrect spelling is offered first and then corrected.
- 8. 01444 732900
- 'I think the one that begins 0-1-2-7-3 is an old one so use this one: it's 0-1-4-double 4-7-3-2-9-double zero.' 'double 4' = 44 and 'double zero' = 00, giving 01444 732900.Common trap: Two-numbers trap — an out-of-date number is read out first, plus 'double' forms that must be expanded.
- 9. guiding
- 'But if your friend would prefer to arrive a bit later she can also help with guiding the runners so they don't go the wrong way.'Common trap: Listed-activity trap — setting up the course is already printed on the notes as the previous item.
- 10. taking photos
- The weekly report is 'illustrated', and the friend 'really likes taking photographs' — confirmed by 'I don't know whether Pete has anyone to take photographs this week.'Common trap: Paraphrase trap — 'illustrate' has to be matched to taking photographs, which is said only afterwards.
- 11. sharks
- 'The next stop after the station is the aquarium which is famous for its dolphin show and which has recently expanded to include sharks.' Dolphins are already printed in the table, so the new attraction is sharks.Common trap: Already-given trap — dolphins are printed in the cell, so the word before 'and' cannot be the answer.
- 12. old fishing village
- 'the bus tour goes along the coast road and after a few kilometres comes to the Old Fishing Village ... now used as a harbour for all kinds of sea craft including yachts and some amazing power boats.' The yachts and power boats printed in the table confirm this is stop 3.Common trap: Location-chain trap — the previous stop is named again as the tour leaves it.
- 13. shopping
- 'The tour then heads off to the last stop and this is where most of the shops are. So for those of you keen to do a bit of shopping this is the place for you.' The table prints 'centre', so the answer is 'shopping', giving 'shopping centre'.Common trap: Word-form trap — 'shops' is heard first but the printed word 'centre' requires 'shopping'.
- 14. fountain
- 'This area of the town includes an ancient water fountain where many people like to have their photograph taken.' 'Ancient' is the paraphrase of the printed 'very old'.Common trap: Paraphrase trap — the printed 'very old' has to be matched to 'ancient'.
- 15. student card
- 'children under the age of fifteen are £5 and student tickets are £10 as long as you have a student card.' The £10 price is the student price and it requires a student card.Common trap: Price-list trap — four ticket prices are read out in one sentence and only one matches £10.
- 16. fifty minutes
- 'Buses leave every thirty minutes and each tour takes a total of fifty minutes.' Thirty minutes is the frequency of the buses, not the length of the tour.Common trap: Interval-versus-duration trap — the bus frequency is said immediately before the tour length.
- 17. museum
- 'The bus tour tickets do not include entrance to any of these attractions apart from the museum which is located near the aquarium.' 'Apart from' marks the single exception.Common trap: Exception trap — a negative statement followed by 'apart from', with the aquarium named straight after.
- 18. tourist office
- 'we also have an audio commentary that has been specially recorded for the bus tour by the tourist office.' The local guides are a separate, unguaranteed service.Common trap: Alternative-service trap — the human guides are described just before the recorded commentary.
- 19. rainwear
- 'it does occasionally rain here in the summer so if the weather looks bad, remember to bring some rainwear.'Common trap: Parallel-advice trap — the same 'remember to bring' phrasing is used for sun protection one sentence earlier.
- 20. e-ticket
- 'When you do it online you can print your e-ticket which you must remember to bring with you.' Booking by phone means collecting tickets at a stop instead.Common trap: Booking-method trap — the phone procedure is described in the sentence immediately before the online one.
- 21. become outdated.
- Dave says the system 'is over ten years old and although it was fine when it was first introduced, it is just not good enough now' — i.e. it has become outdated.Common trap: Age-versus-quality trap — the sentence contains both a positive judgement about the past and the negative one about now.
- 22. is too slow.
- 'it sometimes seems the system has crashed but, in fact, it just takes ages to go from one screen to the next' — and Dave confirms 'Well that's the main one'. The system only appears to stop; the real problem is speed.Common trap: Seems-but-in-fact trap — option B is stated and then explicitly cancelled.
- 23. the system does not handle course options.
- 'now we have a lot more courses and what's made it complicated is that many of them have options', and when Randhir says the system should allow for options Dave replies 'Well no, it doesn't.'Common trap: Multiple-causes trap — more courses, options and Dave's workload are all mentioned within a few turns.
- 24. students should create their own timetables.
- 'so what about having an online system that students can use to do their scheduling?' — Dave then says '... and work it out for themselves'. The assistant idea is raised only to be dismissed as impossible.Common trap: Rejected-suggestion trap — the assistant is proposed and dismissed in the same sentence as the real answer.
- 25. be more economical.
- 'OK - that'll probably take longer although it may save you money in the long run.' Saving money = more economical.Common trap: Concession trap — the drawback (longer) is given first and the answer sits after 'although'.
- 26. four or five months.
- It is January, and 'we'll be looking at April or May to improve the existing system' — four or five months. Nine months is the estimate for a completely new system.Common trap: Two-estimates trap — both timescales are given in one sentence and attached to different options.
- 27. senior management
- 'Well, the first question is - do you have support from your senior management?' Randhir confirms 'that's the first thing you need to do and without that we can't go ahead.'Common trap: Sequence trap — Dave says he has already done this, so the step is easy to skip.
- 28. project request
- 'that's the next thing you need to do ... It's called a ‘project request form’.' The word 'form' is already printed, so only 'project request' is needed.Common trap: Already-given trap — 'form' is printed in the step, so the answer is the two words before it.
- 29. meeting
- 'the third thing you should do is see Samir. He's our analyst ... can you send me his contact details and I'll set up a meeting with him.'Common trap: Paraphrase trap — 'see Samir' precedes the word actually needed, 'meeting'.
- 30. conference call
- Face-to-face meetings are ruled out because team members are in different locations; Dave says 'I'm used to having conference calls', and Randhir asks him to set one up.Common trap: Rejected-option trap — face-to-face meetings are named immediately before the answer, and 'call' alone is too short.
- 31. 29,000 years
- 'Well it all started around 29,000 years ago when humans discovered that if you dig up some soft clay from the ground ...'Common trap: Date-cluster trap — several dates appear across the talk, but only one is the age of ceramics.
- 32. southern Europe
- 'they created figurines ... And all this activity was centred around southern Europe where there is also evidence of ceramics that were created much later.'Common trap: Place-cluster trap — China is the other place named in the talk, but it comes much later in the story.
- 33. water
- 'The pots were porous so that, although they could carry water in them, it wasn't possible to store it over a long period.' The pots could store grain but not water.Common trap: Can-versus-cannot trap — grain is what the pots could store, and it is named in the sentence before.
- 34. minerals
- 'In China at around 200 BC, they discovered that by adding minerals to the clay they could improve both the appearance and the strength of the ceramics.'Common trap: Paraphrase — the spoken 'adding' matches the printed 'mixing'.
- 35. white gold
- 'In fact, it became so valuable that it was known as white gold and spies were sent to China ...'Common trap: Naming trap — 'known as' is used twice, once for porcelain itself and once for its nickname.
- 36. china stone
- 'he discovered that by adding quartz and a material called china stone to very high-quality clay he managed to get the same results that the Chinese had been achieving ...'Common trap: Already-given trap — quartz is printed in the sentence, so the answer is the second ingredient.
- 37. cooling
- 'clay is made up of crystalline plates which become locked together in the cooling process whereas glass cools too quickly for crystals to form.' The difference is how fast each cools.Common trap: Process-stage trap — heating is mentioned in the same paragraph, but the difference is in the cooling.
- 38. windows
- 'One of the more innovative uses was to use it in windows as, up until then, they had just been holes in walls.'Common trap: Innovation trap — glass-blowing is named as the other Roman development in the same sentence.
- 39. volcanic ash
- 'The Romans observed that, when volcanic ash mixes with water and then cools, it gets extremely hard and almost impossible to break up.'Common trap: Word-form trap — 'volcanic activity' is mentioned first; the answer needs the substance, volcanic ash.
- 40. harbours
- 'the Romans needed to take control of the seas and for this they needed to build harbours capable of holding a fleet of ships ... made a significant contribution to the success of the Roman Empire.'Common trap: Object trap — 'fleet of ships' is what the harbours hold, not what the Romans built.
Audio transcripts
Part 1 — Preston Park Run enquiry
Dave: Good morning - Dave Smith speaking. Caller: Hi - could I speak to the organiser of the Preston Park Run? Dave: Yes that's me. Caller: Great - um - I was talking to some friends of mine about the run and they suggested I contact you to get some more details. Dave: Sure - what would you like to know? Caller: Well - they said it takes place every Saturday, is that right? Dave: Yes it does. Caller: OK - great! Dave: Do you know where the park is? Caller: Oh yes I've been there before. But it's quite big and I'm not sure where to go. Dave: Well there's a circular track that goes right around the park. The run starts at the cafe, goes past the tennis courts then twice around the lake and finishes back where it started. Caller: OK and what time is the run? Dave: Well the actual run begins at 9 am but the runners start arriving at about 8.45. Caller: OK - so I need to get up early Saturday morning then. And how long is the run? Dave: Well it used to be three kilometres but most people wanted to do a bit more than that so we lengthened it to five kilometres - we now go round the lake twice and that adds an extra two kilometres. Caller: Right - not sure I've ever run that far so I'd better start doing a bit of training. Dave: That's a good idea. But it's not a race, it's really just for fun and the best thing would be to take it easy the first few times you do it and then see if you can gradually improve your time. Caller: Is the run timed then? How do I know how well I've done? Dave: When you cross the finish line you'll be given a bar code and you take this to one of the run volunteers, who will scan it. Then you can get your time online when you go home. Caller: Oh - I see. You collect all the results. Dave: Exactly. Caller: I see - that's great. So how do I register? Dave: Well there are several ways. I could take your details over the phone but it's much easier if you do it using the website. Caller: OK - good. Um, I think that's probably all I need to know for now. Oh yes - does it cost anything to register or do you collect money each week? Dave: Well it doesn't cost anything to register but we do charge for the run. In fact we have just increased the charge to 1.50 pounds. It used to be a pound but because we were making a bit of a loss we have had to increase it by 50p. Caller: OK thanks. I think I have enough information on taking part in the run. Caller: Um - you mentioned volunteers. I have a friend who is interested in helping out. Can you give me some details so I can pass them on to her? Dave: Sure - well you need to ask your friend to contact Pete Maughan. He manages all the volunteers. Caller: OK - I didn't quite catch his surname - was it Morn - M-O-R-N? Dave: No - just a bit more complicated - it's M-A-U-G-H-A-N. Caller: Right - thanks. And could you give me his phone number? Dave: Yes - just a moment. It's here somewhere - let me just find it. Ah I've two numbers for him. I think the one that begins 0-1-2-7-3 is an old one so use this one: it's 0-1-4-double 4-7-3-2-9-double zero. Caller: OK - got that. Can you tell me anything about the volunteering? Like what kind of activities it involves? Dave: Sure - well we need volunteers for basic stuff like setting up the course. We have to do that before all the runners arrive. Caller: OK - so that's a really early start! Dave: Yes that's right. But if your friend would prefer to arrive a bit later she can also help with guiding the runners so they don't go the wrong way. Caller: I see. I believe you do a report on some of the races. Dave: Yes that's right. In fact we do a weekly report on each race and we always try to illustrate it. Caller: OK - well my friend really likes taking photographs. She's just bought a new camera. Dave: Actually that would be great. I don't know whether Pete has anyone to take photographs this week. Caller: Oh, I'll let her know. Dave: OK good. Could you ask your friend to phone Pete and let him know? Caller: Yes I will. Dave: OK thanks. Goodbye. Caller: Goodbye.
Part 2 — Pacton-on-Sea bus tour
Announcer: Thank you for calling the phoneline for the Pacton-on-Sea bus tour. This is a recorded message lasting approximately four minutes and it provides general information on the town bus tour. Pacton-on-Sea is a beautiful west coast town and has attracted tourists for many years. One of the best ways of getting to know the town is to take the bus tour, which provides a wonderful viewing experience from one of our open-top buses. The tour is a round-trip of the town and there are a total of 4 stops where passengers can get on and off the bus. A lot of people start at the first stop which is at the train station as this is where many tourists arrive in the town. The next stop after the station is the aquarium which is famous for its dolphin show and which has recently expanded to include sharks. This is well worth a visit and is very reasonably priced. Leaving the aquarium, the bus tour goes along the coast road and after a few kilometres comes to the Old Fishing Village where you can get off to stroll along the waterfront. There are some original buildings here but most of the area has been modernised and is now used as a harbour for all kinds of sea craft including yachts and some amazing power boats. The tour then heads off to the last stop and this is where most of the shops are. So for those of you keen to do a bit of shopping this is the place for you. Our advice is to go to this part of the town in the morning when it is relatively quiet. It does get very busy in the afternoons, especially at the height of the season. This area of the town includes an ancient water fountain where many people like to have their photograph taken - so do look out for this. Now some details of the costs and timings. A family ticket, which includes two adults and up to three children, costs 30 pounds. An adult ticket costs 15 pounds, children under the age of fifteen are 5 pounds and student tickets are 10 pounds as long as you have a student card. All tickets are valid for 24 hours, which means that you can get on and off the bus as many times as you like within a 24-hour period. So you could, for example, start the tour in the afternoon and complete it the following morning. The first bus of the day leaves the station at 10 am and the last one of the day leaves at 6 pm. Buses leave every thirty minutes and each tour takes a total of fifty minutes. There are many attractions at each of the stops, so wherever you get off the bus there will be plenty to do. The bus tour tickets do not include entrance to any of these attractions apart from the museum which is located near the aquarium. Some buses have local guides, who will point out places of interest and will provide information on the town. However, we cannot guarantee that every bus will have a guide and so we also have an audio commentary that has been specially recorded for the bus tour by the tourist office. Headphones are available on the bus and these are easy to operate. There is no extra charge for these - just plug in, select the required language and adjust the volume. Due to the winter months being rather cold and wet in Pacton-on-Sea, the bus tours only operate from March to September. The weather is usually warm and sunny during these months so remember to bring some sun protection, especially on hot days. And of course, it does occasionally rain here in the summer so if the weather looks bad, remember to bring some rainwear. The bus tours are available no matter what the weather. At the height of the summer the tours can get very busy so you are advised to book. You can book tickets online, over the phone and also at the station and at any of the other tour stops. When booking over the phone you can collect your tickets at any of the stops at the start of your tour. When you do it online you can print your e-ticket which you must remember to bring with you. Thank you for calling the Pacton-on-Sea phoneline and we look forward to seeing you soon on one of our tour buses.
Part 3 — Replacing a college computer system
Randhir: Hello - I'm Randhir Ghotra from the technologies department. Dave: Ah yes. Good. I'm Dave Hadley. Thanks for coming to see me. Randhir: That's OK. I believe you want us to do some work for you? Dave: Yes that's right. Um, I'm responsible for student admissions to the college and I use a computer system to help process student enrolments and to do the timetabling. But it really doesn't suit the way we work these days. It's over ten years old and although it was fine when it was first introduced, it is just not good enough now. Randhir: OK - what problems are you experiencing? Dave: Well, 20 years ago, the college was quite small and we didn't have the numbers of students or tutors that we have now. Randhir: So the system can't handle the increasing volumes ... Dave: Well, there's a lot more data now and it sometimes seems the system has crashed but, in fact, it just takes ages to go from one screen to the next. Randhir: Right. Is that the only problem? Dave: Well that's the main one, but there are others. In the past, doing the timetabling was quite simple but now we have a lot more courses and what's made it complicated is that many of them have options. Randhir: Right - but the system should allow you to include those. Dave: Well no, it doesn't. It was supposed to - and a few years ago we did ask someone from the technologies department to fix it, but they never seemed to have the time. Randhir: Hmm - are there any other issues with the system? Dave: Well - I've been given extra responsibilities and so I have even less time to do the timetabling. If there was anything you could do, Randhir, to make the process more efficient, that would be really helpful. Randhir: Well it sounds like you could do with an assistant but that's obviously not possible, so what about having an online system that students can use to do their scheduling? Dave: How would that work? Randhir: Well - it may mean less choice for students but we could create a fixed schedule of all the courses and options and they could then view what was available ... Dave: ... and work it out for themselves - that sounds great. Randhir: OK, so ... um ... we'll need to decide whether or not to improve the existing system or to build a completely new system. Dave: Well I'd much prefer to have a new system. Quite frankly, I've had enough of the old one. Randhir: OK - that'll probably take longer although it may save you money in the long run. When were you hoping to have this in place? Dave: Well it's January now and the new intake of students will be in September. We need to start processing admissions - in the next few weeks really. Randhir: Well it will take more than a few weeks, I'm afraid. As an initial estimate I think we'll be looking at April or May to improve the existing system but for a new system it would take at least nine months. That would be October at the earliest. Dave: What are the next steps if we are to have a new system? Randhir: Well, the first question is - do you have support from your senior management? Dave: Yes, I've already discussed it with them and they're also keen to get this work done. Randhir: OK, because I was going to say, that's the first thing you need to do and without that we can't go ahead. Dave: Yes, I've done that. Randhir: That's good. Dave: Actually, they mentioned that there's probably a form I need to complete to formally start the project. Randhir: Yes - that's the next thing you need to do. I'll send you an email with a link so you can fill it in online. It's called a 'project request form'. Dave: OK, great. And then what happens? Randhir: Well, I have a list of things but I think the third thing you should do is see Samir. He's our analyst who will look at the system and identify what needs to be done. Dave: OK - can you send me his contact details and I'll set up a meeting with him. Randhir: OK that's good, so we should soon be able to get a team together to start the work. Some members of our team work in different locations so it's not easy to have face-to-face meetings. Dave: That's OK - I'm used to having conference calls providing they are not late at night. Randhir: Right - so I'll send you details of the team and if you could set up a call that would be great. Dave: OK, I'll do that. Randhir: Thanks.
Part 4 — The origins of ceramics
Lecturer: Hi everyone - today I'm going to be talking about the origins of ceramics. So, first of all, let's start off with - what is a ceramic? Well, generally speaking, ceramics are what you get when you apply heat to certain inorganic, non-metallic solids and then allow them to cool. And examples of ceramics are everyday things like earthenware pots, crockery, glassware and even concrete. So how did it all begin? Well it all started around 29,000 years ago when humans discovered that if you dig up some soft clay from the ground, mould it into a shape and then heat it up to a very high temperature, when it cools the clay has been transformed into something hard and rigid. And so - what did those first humans do with their discovery? Well - they created figurines which were small statues and which depicted animals or gods or any shape that the clay could be moulded into. And all this activity was centred around southern Europe where there is also evidence of ceramics that were created much later. The early humans also found a practical use for their discovery, such as storing things like grain - although there were drawbacks. The pots were porous so that, although they could carry water in them, it wasn't possible to store it over a long period. And also, they were quite brittle and shattered very easily if they were dropped. But despite these problems, it was many thousands of years before there were any improvements. In China at around 200 BC, they discovered that by adding minerals to the clay they could improve both the appearance and the strength of the ceramics. But it took nearly a thousand years before they perfected the process to produce high-quality ceramics known as porcelain. And once they had perfected the process, they kept it a secret - for another thousand years! Compared to the first ceramics, porcelain was lighter, finer, harder and whiter and became an important commodity in China's trading with the rest of the world for hundreds of years. In fact, it became so valuable that it was known as white gold and spies were sent to China to discover what they did to the clay to produce such high-quality merchandise. It wasn't until the eighteenth century that the secret began to unravel. A German alchemist called Johann Friedrich Bottger was asked by the king to make gold out of lead. Unfortunately, Bottger failed to achieve this and soon gave up, but in order to please the king he attempted to make high-quality porcelain. And after many years of experimentation, he discovered that by adding quartz and a material called china stone to very high-quality clay he managed to get the same results that the Chinese had been achieving for the last 1,000 years. We'll now look at another ceramic which is made from mixing sand with minerals and heating to over 600 degrees Celsius. When this mixture cools the result is of course glass. The main difference between ceramics made from clay and glass is that clay is made up of crystalline plates which become locked together in the cooling process whereas glass cools too quickly for crystals to form. Apart from that, the process of heating up naturally occurring materials to transform them is the same. The origins of glass date back to 3500 BC but it wasn't until the Roman Empire, 2,000 years ago, that the art of glass-blowing and the practical uses of glass became more widespread. One of the more innovative uses was to use it in windows as, up until then, they had just been holes in walls. It must have been very draughty in those days! The Romans were also responsible for inventing concrete. And although the origins are uncertain, experts think that this is largely due to the high level of volcanic activity in the area. The Romans observed that, when volcanic ash mixes with water and then cools, it gets extremely hard and almost impossible to break up. The chemical reaction that follows is very complex and continues for many years, and the concrete just keeps getting harder. Evidence of this is the numerous Roman remains that are still standing, many of which are almost completely intact. One of the most important facts about concrete for the Romans was that it can be created underwater. As the Roman Empire grew, the Romans needed to take control of the seas and for this they needed to build harbours capable of holding a fleet of ships. Pouring concrete mixture into the sea immediately started the hardening process and rather than just dissolving in the mass of water, the substance was tough and long-lasting. This strange characteristic of concrete made a significant contribution to the success of the Roman Empire.
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