Change of State

Changes of state are chemical changes in matter.

• True

• False

Answer explanation

Changes of state, such as melting or boiling, are physical changes, not chemical changes. Therefore, the statement is false.

Tags

NGSS.MS-PS1-4

Which process does not involve matter in the liquid state?

• melting

• condensation

• evaporation

• sublimation

Answer explanation

Sublimation is the process where a solid turns directly into a gas without passing through the liquid state. In contrast, melting, condensation, and evaporation all involve matter in the liquid state.

Particles lose energy when the change from a liquid to a solid occurs.

• True

• False

Answer explanation

True. When particles transition from a liquid to a solid, they lose energy in the form of heat. This energy loss is necessary for the particles to arrange into a more ordered solid structure.

Tags

NGSS.MS-PS1-4

Matter can change back and forth between any two states of matter.

• True

• False

Answer explanation

True. Matter can indeed change between solid, liquid, gas, and plasma states through processes like melting, freezing, evaporation, and condensation, demonstrating its ability to transition back and forth.

Tags

NGSS.MS-PS1-4

Which procesess involves matter in the liquid and gas states?

• melting an freezing

• sublimation and deposition

• evaporation and melting

• evaporation and condensation

Answer explanation

Evaporation involves the transition from liquid to gas, while condensation is the reverse process, changing gas back to liquid. Thus, both processes involve matter in the liquid and gas states.

Tags

NGSS.MS-PS1-4

Why do particles speed up when heat is added?

• Heat decreases the kinetic energy of the particles.

• Heat is a form of energy.

Answer explanation

Heat is a form of energy that increases the kinetic energy of particles, causing them to move faster. Therefore, when heat is added, particles speed up due to the energy transfer.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The reverse of the process of sublimation is called

• condensation

• vaporization

• freezing

• deposition

Answer explanation

The reverse of sublimation, where a gas turns directly into a solid, is called deposition. This process contrasts with sublimation, which is the transition from solid to gas.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the process by which matter changes from a gas to a solid?

• freezing

• deposition

• melting

• evaporation

Answer explanation

The process by which matter changes from a gas directly to a solid is called deposition. This occurs without passing through the liquid phase, unlike freezing, which involves a liquid turning into a solid.

Tags

NGSS.MS-PS1-4

How is energy involved in changes of state?

• Particles always absorb energy when there is a change of state

• The energy of particles of matter determines the matter's state.

• Particles always lose energy when there is a change of state.

• Particles of matter do not gain or lose energy when changing state.

Answer explanation

The correct choice highlights that the energy of particles determines the state of matter. When energy is added or removed, it affects particle movement, leading to changes in state, such as melting or freezing.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the reverse of the process of sublimation?

• condensation

• evaporation

• freezing

• deposition

Answer explanation

The reverse of sublimation, where a solid turns directly into a gas, is deposition. In deposition, gas transforms directly into a solid without becoming a liquid first, making it the correct answer.

Tags

NGSS.MS-PS1-4