6-7 Physics

Weather is created by the interaction of air, water, and (a)   .

The rising of warm air creates a phenomenon known as an (a)   .

Clouds are formed from millions of tiny water (a)   .

When the ice crystals in a cloud grow heavy enough, they fall as (a)   .

Wind is caused by the movement of air due to differences in (a)   .

An engine requires three key ingredients to run: gas, air, and a (a)   .

The movement of fuel from the tank to the engine is done through a (a)   .

The process of mixing air and fuel in the engine takes place in the (a)   .

A spark plug generates the (a)   necessary to ignite the fuel mixture.

The function of the exhaust system is to remove burnt (a)   from the engine.