Radioactivity around us

When you are exposed to radiation and not become radioactive, you are _________

• irradiated

• contaminated

• irritated

• conditioned

When an object has a radioactive material introduced into (or onto) it and becomes radioactive, that object is ___________

• irradiated

• contaminated

• irritated

• condisioned

A small amount of radiation around us all the time because of radioactive materials in the environment is called _________

• background radiation

• natural radiation

• artificial radiation

• material radiation

The example of natural radiation

• radon

• x-ray

• nuclear power station

• nuclear weapon test

The example of artificial radiation

• x-ray

• building material

• cosmic ray

• food

As you go to higher altitude, you are exposed to more radiation from ________

• cosmic ray

• radon gas

• building material

• nuclear power station

As you go down the underground, you are exposed to more radiation from _______

• rocks

• cosmic ray

• x-ray

• food

The instrument to monitor the level of a radiation

• Geiger-Muller

• Geiger-Mullet

• count rate

• count/s

Geiger Muller measure the level of radiation using ____________ principal

• ionisation

• expantion

• radiation

• background

This radiation contribute the most to our body's exposure from radiation

• food

• radon gas

• rock

• medical source