Quiz 17 Sec. 6.2--6.8 Flashcards
1
Q
Like charges _____; opposite charges attract.
A
repel
2
Q
Early compasses were made from rocks called
A
lodestones
3
Q
When one object gives some or all of its energy to another object, _____ of energy takes place.
A
transfer
4
Q
The temperature at which a solid becomes a liquid is called the ____ point.
A
melting
5
Q
The temperature at which a liquid becomes a gas is called the ____ point.
A
boiling
6
Q
The temperature at which a liquid becomes a solid is called the ____ point.
A
freezing
7
Q
Combustion is another word for
A
burning
8
Q
All fuels need ____ in order to burn.
A
oxygen
9
Q
The higher the ___ number of a gasoline, the better the “anti-knock” quality.
A
octane
10
Q
The engine of the first airplane turned a ___ that pulled the airplane through the air.
A
propeller (prop)
