Changes in state

Freezing occurs when the particles in liquid slow down and take fixed positions.

• True

• False

Tags

NGSS.MS-PS1-4

Particles of which of the following have the greatest thermal energy?

• a gas

• a liquid

• a solid

• an amorphous solid

Tags

NGSS.MS-PS1-4

Water particles in gas coming off of a pan of boiling water are moving slower than the particles of the water in the pan.

• true

• false

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-1

NGSS.MS-PS3-5

When you open a solid room air freshener, the solid slowly loses mass and volume as the solid turns into a gas as the room freshener's particles escape and mix with the air in the room. This process is known as ______.

• Sublimation

• boiling

• freezing

• condensation

Tags

NGSS.MS-PS1-4

According to the law of conservation of mass

• mass is lost only in chemical changes.

• mass is lost only in physical changes.

• total mass stays the same in changes of state.

• only energy is lost in changes of state.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

According to the law of conservation of energy,

• energy is not absorbed or released in changes of state.

• energy is not transferred during changes of state.

• energy is not created or destroyed in changes of state.

• a substance has the same energy before and after a change of state.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

The temperature at which a substance changes from a liquid to a solid is the

• freezing point.

• saturation point.

• boiling point.

• condensation point.

Tags

NGSS.MS-PS1-4

A substance changes from a liquid to a gas during evaporation because

• energy is lost.

• energy is released.

• energy is created.

• energy is absorbed.

Tags

NGSS.MS-PS1-4

What happens to the particles of a substance when it condenses?

• Particles speed up and spread out.

• Particles slow down and clump together.

• Particles stick together and stop moving.

• Particles vibrate as they lose energy.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

According to the kinetic theory of matter, which of the following statements is true about matter?

• The atoms and molecules of a substance are always in motion.

• The higher the temperature of a substance, the faster its particles

  move.

• More massive particles move more slowly than less massive

  particles.

• All are true

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4