States of Matter & Phase Changes

Can be observed directly, without a new substance being formed.

• chemical change

• emotional change

• physical change

• loose change

Tags

NGSS.MS-PS1-4

What 2 things determine what state of matter a substance is in?

• How close the molecules are to one another

• How quickly they move.

• The shape of the substance.

• The flammability of the substance.

Tags

NGSS.MS-PS1-4

This is dry ice. It is changing phases from solid directly to gas, skipping the liquid phase. What is this called?

• deposition

• sublimation

• freezing

• evaporation

Tags

NGSS.MS-PS1-4

Frost forms when the air is warmer than the ground, and water vapor goes from gas directly to solid, skipping the liquid phase. This is an example of what type of phase change?

• deposition

• sublimation

• freezing

• evaporation

Tags

NGSS.MS-PS1-4

During this phase change, molecules in the substance are being energized.

• melting

• freezing

• deposition

• condensation

Tags

NGSS.MS-PS1-4

During this phase change, molecules in the substance are losing energy.

• melting

• freezing

• evaporation

• sublimation

Tags

NGSS.MS-PS1-4

This phase change occurs when energy is added to a solid.

• melting

• freezing

• evaporation

• sublimation

Tags

NGSS.MS-PS1-4

This state has a definite shape.

• solid

• liquid

• gas

• plasma

Tags

NGSS.MS-PS1-4

This state takes the shape of its container.

• solid

• liquid

• gas

• plasma

Answer explanation

Liquid takes the shape of its container because the molecules in a liquid can flow past one another, and are NOT fixed in their position.

Tags

NGSS.MS-PS1-4

This state fills its container.

• solid

• liquid

• gas

• plasma

Answer explanation

Gases spread out indefinitely to fill the size of the container, no matter how much gas there is or how large the container.