matter review

Front

_________ are the basic units of matter that make up everything.

Back

atoms

Front

_____________ are made up of more than one atom bonded together. They can be very simple or very complex.

Back

molecules

Front

In a solid, the molecules

Back

are closely spaced, vibrate in place, definite volume and definite shape.

Front

In a liquid, the molecules

Back

are spread wider apart, in constant contact, medium amount of energy, have a definite volume but no definite shape.

Front

In a gas, the molecules

Back

are widely spaced, move quickly (high energy), no definite volume or shape.

Front

In order for a solid to melt, or change into a liquid, thermal (heat) energy must ___________.

Back

increase

Front

What happens to the energy of molecules in a substance when heat is added?

Back

increase

Front

100 ml of castor oil weighs 96.9g. Does castor oil float in water?

Back

yes

Front

When heat is added to a substance, the density of the substance

Back

decreases

Front

When energy is added to molecules, the temperature of the molecules in a substance

Back

increases