States of Matter Concepts

If I lower the pressure on a liquid, I will:

• increase the boiling point.

• decrease the boiling point.

• not change the boiling point.

Answer explanation

Air pressure is like a weighted blanket. The less air pressure there is, the easier it is for the atoms to move, and the less energy is required to boil a liquid.

It is impossible for all three states of matter to exist at the same time.

• True

• False

Answer explanation

The Triple Point is the point at which, under perfect atmospheric conditions, all three states of matter exist simultaneously.

Energy is the same as

• heat.

• coffee.

• sugar.

Answer explanation

Energy and heat are considered synonyms for this unit.

When energy is absorbed, temperature

• decreases.

• stays the same.

• increases.

Exothermic reactions​ (a)   energy. Endothermic reactions​ (b)   energy.

• release
• absorb

A solid can never change directly to a gas.

• True

• False

Answer explanation

This process is called Sublimation.

It is impossible for a gas to change directly to a solid.

• True

• False

Answer explanation

This process is called Deposition.

The three most common states of matter on Earth are solid, liquid, and gas.

• True

• False

Answer explanation

The most common state of matter in the universe is plasma!

When matter absorbs energy, atoms​ (a)  

• speed up.
• slow down.

When energy is released, atoms​ (a)  

• slow down.
• speed up.