Chapter 9-The Night Sky

Question 0

What is the order of planets in Ptolemy’s model?

Answer 0

Earth, moon, mercury, venus, sun, mars, jupiter, saturn

Question 1

Describe Ptolemy’s Model

Answer 1

In his model the Earth was in the centre of the universe. The moon, sun and planets orbited the Earth which did not move at all. The universe was surrounded by a sphere called the celestial sphere to which all the stars were attached. The model was accepted for 1500 years.

Question 2

Draw Ptolemy’s model

Answer 2

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Question 3

Describe Copernicus’ Theory

Answer 3

Copernicus’ Theory is the current accepted model of the solar system. It explains the movement of the stars. All planets orbit around the sun.

Question 4

Draw Copernicus’ Theory

Answer 4

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Question 5

What is a solar eclipse?

Answer 5

A solar eclipse is when the moon passes between the Earth and the Sun during the day. Solar eclipses are rarer than luna eclipses.

Question 6

What is a total solar eclipse?

Answer 6

A total solar eclipse is when the dark centre of the shadow falls on the earth and the sun is blocked out.

Question 7

What is a luna eclipse?

Answer 7

A luna eclipse is when the shadow of the Earth falls on the moon.

Question 8

When can luna eclipses occur?

Answer 8

They can only happen during a full moon.

Question 9

Draw the phases of the moon.

Answer 9

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