Gravity & Space

An object’s weight:

• is caused because it is pulled towards the Earth.

• is caused by the Earth’s magnetic field.

• is caused by the air pushing down on it.

• stays the same, even if its mass changes.

The direction ‘down’ is:

• the same everywhere.

• at right angles to the ground.

• towards the centre of the Earth.

• different under water.

Which statement is not true?

• The Earth attracts objects because it has a large mass.

• You are attracting this Quiz paper with a small force of gravity.

• Only large objects like the Earth produce a force of gravity.

• Your body is attracting the Earth.

A bag of sugar has a mass of 1 kg. What is its weight?

• 1N

• 10N

• 10kg

• 0.1N

Gravity is less on the Moon than on the Earth because:

• the Moon is smaller than the Earth.

• the Moon has a bigger mass than the Earth.

• the Moon is bigger than the Earth.

• the Moon has less mass than the Earth.

On Mars, the strength of gravity is 9 N/kg.

If your mass is 50 kg, how much would you weigh on Mars?

• 450N

• 90N

• 50N

• 45N

Gravity:

• gets less if two objects get closer together.

• gets bigger if two objects get further apart.

• gets less if two objects get further apart.

• does not depend on distance.

Which statement is true?

• Gravity always pulls a spacecraft towards the nearest planet.

• There is no gravity in space.

• Gravity is the same at all times during a space journey.

• Gravity depends on how close a spacecraft is to a planet.

There have been different ideas about the Solar System in the past. Which one of these was not suggested?

• The Moon is at the centre with the planets orbiting around it.

• The planets are fixed to solid spheres that move around the Earth.

• The planets move in circles around the Earth.

• The planets move in circles around the Sun.

Why do we believe our current model of the Solar System?

• We can see the elliptical orbits.

• It can accurately predict the movements of the planets.

• It agrees with religious ideas.

• We have sent people to visit the Moon.