Phases of Matter

Front

What must occur for a substance to move from a solid to a liquid?

Back

The substance must undergo an endothermic reaction and absorb energy.

Front

What happens to particles in an object at higher temperatures?

Back

Particles in an object move faster.

Front

What is matter?

Back

Matter is anything that has mass and volume.

Front

What must happen to dry ice for carbon dioxide gas to enter the air?

Back

Dry ice must undergo an endothermic change.

Front

What happens to particles when a liquid becomes a gas?

Back

Particles spread apart from one another.

Front

Define solid in terms of particle arrangement.

Back

In a solid, particles are closely packed together in a fixed arrangement.

Front

What is an endothermic reaction?

Back

An endothermic reaction is a process that absorbs energy from its surroundings.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a process that releases energy to its surroundings.

Front

How does temperature affect the energy of particles?

Back

As temperature increases, the energy of particles increases.

Front

What is the difference between a gas and a liquid in terms of particle movement?

Back

In a gas, particles move freely and are far apart; in a liquid, particles are close but can slide past each other.