# Sun and Moon

In this worksheet, students will learn and read about how we see the Sun and the Moon and how eclipses occur.

Key stage:  KS 3

Curriculum topic:   Physics: Space Physics

Curriculum subtopic:   Seasons and the Earth's Tilt

Difficulty level:

### QUESTION 1 of 10

The Earth has a natural satellite that orbits it, the Moon. There is no air, wind or rain on the Moon, which means there is no life. However, it is because of the Moon that there is life on Earth. Billions of years ago, the Earth crashed with another planet. This collision caused a part of the Earth to break away, but it was kept in orbit around the Earth due to the Earth's gravity. The Moon's gravity causes tides nowadays, but millions of years ago it is believed that it was the Moon's gravity that gathered all the water and steam in the atmosphere and turned them into the oceans.

The Moon is much smaller than the Earth and it does not produce its own light. We can see it because it reflects light from the Sun. The Moon's shape does not change, but we see different parts of it lit up, so it appears to be in different shapes; these are called the phases of the Moon (see diagram).

Half of the Moon is always lit by the Sun, but we cannot see all of the lit part. When the Moon is between the Sun and the Earth, we cannot see any lit part of the Moon. This is what we call a new moon. When we can see all of the lit part of the Moon it is a full moon. It takes 29.5 days between two full moons; this is called a lunar month. It takes 29.5 days for the Moon to orbit the Earth.

Sometimes the Moon moves into the shadow of the Earth (see bottom part of diagram below) and a lunar eclipse takes place.

When the Moon is directly between the Earth and the Sun, part of the Earth is in the shadow of the Moon. This is called a solar eclipse, as people in the shadow cannot see any part of the Sun (total eclipse). At the same time, people in some other parts of the Earth can still see part of the Sun (partial eclipse). The upper part of the diagram above shows a solar eclipse.

What is the Earth's natural satellite?

The Milky Way

The Moon

Venus

Why is there no life on the Moon?

because there is no atmosphere with air, wind and rain

because it is too far from the Sun

because the Moon is not a planet

Is this statement true or false?

The Moon produces its own light.

true

false

Is this statement true or false?

The Moon changes shape.

true

false

What do we call the different shapes of the Moon we see?

Complete this sentence.

We have new moon when ______________________________ .

we can see all of the lit part of the Moon

we can see no lit part of the Moon

the Moon is between the Sun and the Earth

Is this statement true or false?

When we have full moon, we can see all of the lit part of the Moon.

true

false

How long is a lunar month?

29.5 days

28.5 days

29.6 days

Complete this sentence.

We have a lunar eclipse when __________________________________ .

the Moon falls into the shadow of the Earth

the Moon is directly between the Sun and the Earth

we can see all of the lit part of the Moon

Complete this sentence.

We have a solar eclipse when _____________________________________ .

the Moon falls into the shadow of the Earth

we can see all of the lit part of the Moon

the Moon is directly between the Earth and the Sun

• Question 1

What is the Earth's natural satellite?

The Moon
EDDIE SAYS
The Moon is the Earth's natural satellite.
• Question 2

Why is there no life on the Moon?

because there is no atmosphere with air, wind and rain
EDDIE SAYS
There is no atmosphere on the Moon, which means no air, rain or wind. This makes life impossible.
• Question 3

Is this statement true or false?

The Moon produces its own light.

false
EDDIE SAYS
The Moon does not produce its own light. It reflects light from the Sun.
• Question 4

Is this statement true or false?

The Moon changes shape.

false
EDDIE SAYS
The Moon does not change shape, but we see different lit parts of it at different times, so the shape appears to change.
• Question 5

What do we call the different shapes of the Moon we see?

the phases of the moon
phases of the moon
the moon phases
moon phases
EDDIE SAYS
The phases of the moon are the different shapes we see, as we see different lit parts of the Moon at different times.
• Question 6

Complete this sentence.

We have new moon when ______________________________ .

we can see no lit part of the Moon
EDDIE SAYS
We have new moon when we can see no lit part of the Moon.
• Question 7

Is this statement true or false?

When we have full moon, we can see all of the lit part of the Moon.

true
EDDIE SAYS
When we have full moon we can see all of the lit part of the Moon. This is true.
• Question 8

How long is a lunar month?

29.5 days
EDDIE SAYS
The lunar month is 29.5 days.
• Question 9

Complete this sentence.

We have a lunar eclipse when __________________________________ .

the Moon falls into the shadow of the Earth
EDDIE SAYS
A lunar eclipse takes place when the Moon moves into the shadow of the Earth.
• Question 10

Complete this sentence.

We have a solar eclipse when _____________________________________ .

the Moon is directly between the Earth and the Sun
EDDIE SAYS
A solar eclipse takes place when the Moon is directly between the Sun and the Earth.
---- OR ----

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