Background radiation

Cosmic radiation comes from ....

• Nuclear bombs

• Nuclear Power stations

• Space

• Earth's core

• Isotopes in objects

Which things give out ionizing radiation?

• Bricks

• food

• air

• rocks

The low level of ionizing radiation that is around you right now is called ....

• background radiation

• isotopic radiation

• surrounding radiation

• environmental radiation

• radio radiation

background radiation is the same level everywhere

• true

• false

All atoms are radioactive

• true

• false

Granite rock is radioactive because it ...

• releases radon gas

• releases oxygen gas

• releases uranium gas

• releases nitrogen gas

• releases hydrogen gas

Which gas is a major source of background radiation?

• radon gas

• carbon dioxide gas

• sulfur Dioxide gas

• oxygen gas

• hydrogen gas

Which element is usually radioactive?

• radon

• mercury

• helium

• oxygen

• hydrogen

Background radiation is ...

• 0% natural

• 100% natural

• 80-90% natural

• 10-20% natural

Human activities can increase the amount of background radiation

• true

• false