Space KS4 Plenary

What force keeps the planets in orbit around the Sun?

• Air resistance

• Momentum

• Gravity

Approximately how long ago did the Big Bang occur?

• 12.7 billion years

• 13.7 billion years

• 4.7 billion years

Which of these answers is evidence for the Big Bang?

• Galaxies are moving towards us

• The further away a galaxy is the slower it moves

• Galaxies are moving away from us

Evidence for the Big Bang is provided by which of these answers?

• Doppler effect

• Red shift

• Green shift

What are the 4 rocky planets in our solar system

• Mercury, Earth, Saturn, Neptune

• Mercury, Venus, Earth, Mars

• Jupiter, Saturn, Uranus, Neptune

What are comets made of?

• Ice and Dust

• Big ball of mud

• Rock and Metal

What is at the centre of our solar system?

• Comet

• Black hole

• Sun

Why is it often easy to see comets?

• They are large

• The Sun's heat causes a tail of vapour

• Air resistance causes a tail of vapour

Communication satellites are often in geostationary orbits. What does this mean?

• When the satellite stays in exactly the same place in space

• When the satellite rotates around Earth faster than the Earth spins

• When the satellite stays in the same place orbiting Earth