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Earth, Sun and Moon 3

Students extend their knowledge of forces to the 'pull' of the sun, Earth and moon and how we feel the effects.

Key stage:  KS 2

Curriculum topic:  Earth and Space

Curriculum subtopic:  Movement of Earth and the Planets

Difficulty level:  

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QUESTION 1 of 10

At the centre of our solar system is a star: the Sun. Orbiting the sun are eight planets.

 

 

We know that a force called gravity pulls us towards the centre of our planet, Earth. All objects have 'gravity', but we only feel the gravity of large objects: The bigger the object, the bigger the gravity.

 

The sun is many times bigger than the Earth, so it has a big 'pull', or gravity. Without the sun we would fly off into space!

 

The moon's orbit around the Earth is also due to gravity – the pull of the Earth on the moon.

The moon is a smaller object, so its gravity is smaller than the gravity on Earth. We weigh less on the moon and can jump higher!

 

 

Without gravity we cannot keep our feet on the ground!

Which THREE statements are true?

The moon spins on its axis.

The Earth rotates on its axis.

The planets travel around the sun.

All the planets have the same orbit.

All the planets are the same distance from the sun.

The sun, Earth and moon are not falling through space because...

giant green aliens hold them up

there is no gravity pulling them down

The moon does not spin off into space because of the Earth's... 

atmosphere

magnetic field

gravity

The moon affects sea and ocean tides beacause it has...

influence

gravity

the ability to change shape

 

As the Earth spins on its axis, what fraction is ALWAYS in DARKNESS?

one third

one quarter

one half

The length of shadows changes across the day because...

the sun moves

the Earth spins

the time changes

Some planets in our solar system are too cold for plants and animals to live on them because...

they are far away from the sun

they are close to the sun

they are always in darkness

Mercury and Venus are hotter than the Earth because they are... 

very small

closer to the sun

tiny stars

If we could travel to Jupiter, Saturn, Uranus or Neptune...

 

 

...we would not be able to stand on the surface of these planets because...

our legs would be too wobbly

they are made of candy floss

they are made of gas

  • Question 1

Which THREE statements are true?

CORRECT ANSWER
The moon spins on its axis.
The Earth rotates on its axis.
The planets travel around the sun.
EDDIE SAYS
The Earth and the moon rotate. The other planets in our solar system orbit the sun at different distances from it.
  • Question 2

The sun, Earth and moon are not falling through space because...

CORRECT ANSWER
there is no gravity pulling them down
EDDIE SAYS
There is no 'up' or 'down' in space, because there are no forces acting in these directions. The pulling forces are between the sun and the planets.
  • Question 3

The moon does not spin off into space because of the Earth's... 

CORRECT ANSWER
gravity
EDDIE SAYS
Just as we are pulled towards the centre of the Earth, so too is the moon!
  • Question 4

The moon affects sea and ocean tides beacause it has...

CORRECT ANSWER
gravity
EDDIE SAYS
Because the moon is smaller than the Earth, its gravity is less, but this force does have a pulling effect on the seas and oceans.
  • Question 5

 

As the Earth spins on its axis, what fraction is ALWAYS in DARKNESS?

CORRECT ANSWER
one half
EDDIE SAYS
Because the Earth is a spinning sphere, only one half is in sunlight at any one time.
  • Question 6

The length of shadows changes across the day because...

CORRECT ANSWER
the Earth spins
EDDIE SAYS
Remember, the sun APPEARS to move, but that's because the Earth is spinning!
  • Question 7

Some planets in our solar system are too cold for plants and animals to live on them because...

CORRECT ANSWER
they are far away from the sun
EDDIE SAYS
Planets which are far from the sun are too cold to support life, as we know it, because any water there is frozen.
  • Question 8

Mercury and Venus are hotter than the Earth because they are... 

CORRECT ANSWER
closer to the sun
EDDIE SAYS
The planets Mercury and Venus are closer to the sun than Earth, making them hotter than Earth.
  • Question 9

If we could travel to Jupiter, Saturn, Uranus or Neptune...

 

 

...we would not be able to stand on the surface of these planets because...

CORRECT ANSWER
they are made of gas
EDDIE SAYS
These planets, Jupiter, Saturn, Uranus and Neptune are called gas planets, or gas giants - swirling masses of gas around a liquid rock or metal centre. WOW!
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