Discuss these questions with your partner.

Can you explain why we see colours?

Do you know the famous story of how Newton discovered gravity?

И F Listening N)))

You will hear part of a radio programme about great scientists. Listen and fill in the notes.

Optics is the branch of physics that studies the

physical (1) of light known

as optics.

Newton claimed that a prism could

2. ) white light into a spectrum

of colours.

A second prism and lens could recompose the multi-coloured spectrum into

2. ) light.

Newton said (4) with coloured

light caused us to see colours.

Newton believed light is made up of particles connected to (5)

Newton’s calculations said gravity kept the Moon in (6)

G Speaking

Discuss these questions with your partner.

Do you agree that Newton was one of the most important scientists in world history? Why / Why not?

-* What areas of science was Newton’s contribution crucial to?

Task

Remember to:

• p

  т

  resent the facts in chronological order

• use the full names of the scientists when referring to them for the first time

Speaking tips

• If you don’t know a word, explain what you mean using other words you know.

• Don’t speak too quickly. It isn’t a conversation and the class may not catch everything you say.

Read text I again and give a two- minute presentation on the Law of Universal Gravitation.

Talk about:

• the geocentric theory

• heliocentric theories

• Newton and his theory of gravity

First complete these notes. Use them in your presentation.

To begin with, we need to discuss what was believed in ancient times. The geocentric theory held

Later theories were based on

and the theories said

Isaac Newton added to these theories by -

Newton’s theories are still important because

й H Writing

You have been asked to write a newspaper article about Isaac Newton. Write the article, giving biographical information and an explanation of his many achievements.

For your research take notes from texts I and 2 and exercise F listening.

Use this plan:

Title (think of an eye-catching title)

PARAGRAPH 1

Explain who you’re writing about and why.

PARAGRAPH 2

Give an overview of Newton’s life.

PARAGRAPHS 3 AND 4

Give examples of his theories and how he arrived at the conclusions.

PARAGRAPH 5

Sum up by briefly restating his life and achievements and say what kind of impression Newton made on you.

Write 200-250 words.

Before you read

Discuss these questions with your partner.

Have you heard of quantum mechanics?

-¥ What are atoms made up of?

H A Vocabulary

Complete the sentences below with words from the box.

/		N
evidence	tiny
back up	adequately
duality	radiates
distinct V		J