CHANGE OF STATE OF MATTER

Which of the following best describes the process of sublimation?

• A gas turning directly into a liquid

• A solid turning directly into a gas

• A liquid turning into a gas at the surface

• A solid melting into a liquid

Answer explanation

Sublimation is the process of a solid turning directly into a gas, skipping the liquid phase.

Tags

NGSS.MS-PS1-4

What happens to the movement of particles in a liquid when it is cooled down to its freezing point?

• The particles gain energy and move faster.

• The particles stop moving entirely.

• The particles lose energy and move closer together.

• The particles expand and move farther apart.

Answer explanation

When a liquid is cooled to its freezing point, the particles lose energy and move closer together, leading to the formation of a solid structure.

Tags

NGSS.MS-PS1-4

Which of the following conditions must be met for water vapor to condense into liquid water?

• The temperature must increase significantly.

• The pressure must decrease significantly.

• Heat energy must be removed from the water vapor.

• Heat energy must be added to the water vapor.

Answer explanation

Heat energy must be removed from the water vapor.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

During the melting process, which of the following changes occurs at the particle level?

• Molecules move closer together and arrange into a regular pattern.

• Molecules lose energy and start moving more slowly.

• Molecules gain energy and break free from their fixed positions.

• Molecules expand and move further apart, creating more space.

Answer explanation

During the melting process, molecules gain energy and break free from their fixed positions, transitioning from a solid to a liquid state.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

When carbon dioxide gas undergoes deposition, what is the final state of matter, and what happens to the energy of the particles?

• Solid; the particles lose energy and slow down.

• Liquid; the particles gain energy and speed up.

• Gas; the particles gain energy and speed up.

• Liquid; the particles lose energy and slow down.

Answer explanation

When carbon dioxide gas undergoes deposition, it transitions directly to a solid state. During this process, the particles lose energy and slow down, leading to the formation of a solid.

Tags

NGSS.MS-PS1-4

When water is heated and changes from a liquid to a gas, what is this process called?

• Freezing

• Melting

• Condensation

• Vaporization

Answer explanation

When water is heated and changes from a liquid to a gas, this process is called vaporization.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What must be added or removed to change the state of matter?

• Light

• Heat

• Pressure

• Sound

Answer explanation

To change the state of matter, heat must be added or removed. This can cause substances to transition between solid, liquid, and gas states.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following is an example of condensation?

• Ice melting in the sun

• Water vapor forming droplets on a cold glass

• Snow forming from water vapor in the air

• Water boiling on the stove

Answer explanation

Condensation is the process of water vapor turning into liquid water, which is exemplified by water vapor forming droplets on a cold glass.

Tags

NGSS.MS-ESS2-4

Which of the following is NOT a way that matter changes phase?

• Melting

• Freezing

• Vaporization

• Mixing

Answer explanation

Mixing is NOT a way that matter changes phase. Melting, freezing, and vaporization are all phase changes, while mixing is a process of combining substances without changing their individual phases.

Tags

NGSS.MS-PS1-4

When water vaporizes at room temperature, it changes into

• fog

• ice

• steam

• water vapour

Answer explanation

When water vaporizes at room temperature, it changes into water vapour, which is the correct choice among the options provided.

Tags

NGSS.MS-PS1-4