Abeka 5th Grade, Science Quiz 17 (6.2 - 6.8)

burning

Combustion is another word for __________.

propeller (prop)

The engine of the first airplane turned a _____ that pulled the airplane through the air.

transfer

takes place when one object gives some or all of the energy to another object.

lodestones

the rocks that were used to make early compasses

oxygen

what all fuel needs in order to burn

repel

like charges ______ each other

attract

opposite charges ____ each other

octane

The higher the ____ number of a gasoline, the better the "anti-knock" quality.

freezing

The temperature at which a liquid becomes a solid is called the ____ point.

melting

The temperature at which a solid becomes a liquid is called the __________ point.

boiling

The temperature at which liquid becomes a gas is called the _______ point.