EAP A2 Unit 9 A, B

Match the following

• engineering

• Ibn al-Haytham (965-1040) studied light and optics and made the first type of camera.

• scientific

• No one knows the inventor of the wheel, but the Sumerians of Mesopotamia used it in around 4500 BC.

• mathematical

• Galileo Galilei (1554-1642) discovered Jupiter's moons.

• astronomical

• Ludwik Zamenhof invented the international language of Esperanto in 1887.

• linguistic

• Over 5000 years ago the Chinese used the first abacus for counting.

Listen and complete the notes/sentences

1. ​ (a)   evidence

-groups of ​ (b)   often lived in communities of about 150

-the number of ​ (c)   in a typical military unit was around 150

• historical
• people
• soldiers
• business
• opened a new factory
• social media
• social communication
• friendship
• an older friend
• the number of friends

Listen and complete the notes/sentences

2. ​ (a)   evidence

-Bill Gore (of Gore-Tex clothing) decided that 150 was the maimum number of ​ (b)   in one factory

-whenever the number in a factory has reached 150, Gore-Tex has ​ (c)  

• business
• employees
• opened a new factory
• social media
• social communication
• students
• friendship
• an older friend
• didn't
• the number of friends

Listen and complete the notes/sentences

3. Social media evidence

-in a study published in the Proceedings of the National Academy of Sciences, Dunbar studied the ​ (a)   of 24 ​ (b)  

-when a student made a new close ​ (c)   , they spent less time communicateing with ​ (d)   ; they ​didn't incrase the communication, but they limited ​ (e)  

• social communication
• students
• friendship
• an older friend
• the number of friends.
• soldiers
• business
• employees
• opened a new factory
• people

Please listen and repeat. Record your responses.

Verb forms: Past simple or present perfect? Choose the correct form of the verb.

In the 11th century, about 150 people __________ in the average English village.

• lived

• have lived

Verb forms: Past simple or present perfect? Choose the correct form of the verb.

Ten year ago, Dunbar __________ how many greeting cards a typical ENglish family sent. He discovered that the average figure was 153.5.

• studied

• has studied

Verb forms: Past simple or present perfect? Choose the correct form of the verb.

He discovered that the average figure __________ 153.5.

• was

• has been

Verb forms: Past simple or present perfect? Choose the correct form of the verb.

Programmers at social network companies like facebook __________ interested in Dunbar's work, because it helps them understand their users.

• became

• have become

Verb forms: Past simple or present perfect? Choose the correct form of the verb.

The size of human social networks __________ for hunderds of years, according to Dunbar. It is the same now as it was 250,000 years ago.

• didn't change

• hasn't changed