How many molecules are there in one centimetre cube of air?
- 45
- 45 million
- 45 billion
- 45 billion billion
half a million atoms lined up beside each other could hide behind one ............
- tree
- human hair
- finger
- pencil
How old is planet Earth?
- 46,000 years
- 4.6 million years
- 4.6 billion years
- 4,600 years
How far is it to the Moon?
- 386,000 km
- 386 km
- 38,600 km
- 386 million km
How fast does light travel?
- 300,000 km per day
- 300,000 km per hour
- 300,000 km per second
- 300,000 km per week
How fast can the fastest man-made spacecraft travel?
- 56,000 km per second
- 56,000 km per hour
- 56,000 km per day
- 56,000 km per week
The universe that we know of is a million million million million miles across. Which number is this?
- 1,000,000,000,000,000,000,000,000
- 1,000,000,000,000
- 1,000,000,000,000,000
- 100,000,000,000,000,000,000,000
How long does an average human live?
- 1,000 hours
- 20,000 hours
- 1 million hours
- 650,000 hours
How many kilograms of ozone can 1 kg of CFC's destroy?
- 1 kg
- 70,000 kg
- 2 kg
- 10 kg