7th grade End of Term

The temperature at which a liquid turns into a solid is called the __________.

• freezing point

• boiling point

• vaporization point

• sublimation point

Tags

NGSS.MS-PS1-4

A(n) ____________ bond is when atoms share electrons.

• ionic

• covalent

• metallic

• polar

The properties of _______________ are different from the properties of the elements in it.

• compounds

• isotopes

• atoms

• ions

Tags

NGSS.MS-PS1-1

The total kinetic energy of the molecules in a substance refers to its __________.

• heat

• momentum

• temperature

• viscosity

Tags

NGSS.MS-PS1-4

When a substance loses heat energy, __________.

• its molecules slow down

• its molecules are not affected

• its molecules speed up

• its molecules break apart

Tags

NGSS.MS-PS1-4

If a substance has a lot of thermal energy, its atoms and molecules are _________.

• moving very slowly

• moving very rapidly

• moving upward against the force of gravity

• moving together in the same direction

Tags

NGSS.MS-PS1-4

As a substance changes at constant pressure from a solid to a liquid and then to a gas, what happens to the kinetic energy of the particles?

• The kinetic energy decreases because the speed of the particles is decreasing.

• The kinetic energy increases because the speed of the particles is increasing.

• The kinetic energy decreases because the mass of the substance decreases.

• The kinetic energy increases because the volume of the substance is increasing.

Tags

NGSS.MS-PS1-4

Evaporation is the change of a substance from __________.

• a gas to a liquid

• a solid to a gas

• a liquid to a gas

• a liquid to a solid

Tags

NGSS.MS-PS1-4

To change a substance from a liquid to a solid, it must be cooled to its __________.

• boiling point

• melting point

• coefficient of heat

• specific heat

Tags

NGSS.MS-PS1-4

The temperature at which a liquid changes to a gas is its __________.

• boiling point

• melting point

• coefficient of heat

• specific heat

Tags

NGSS.MS-PS1-4