Science Unit 2-Chapter 2

What changes when a substance is heated or cooled?

• Their properties CAN change.

• Their properties do NOT change.

• It smells different.

If a substance doesn't change back to the way is was, it has become a different substance.

• true

• false

How can ice change back into water?

• by cooling it

• by melting in back into liquid water

• by freezing it

What holds its shape and doesn't make puddles, like wood and rocks?

• liquid

• solid

• gas

What happens when you burn wood?

• it turns into liquid

• it turns into ashes and smoke

• it changes into solids

Can you change ashes back into wood?

• yes

• no

• sometimes

When one thing makes another thing happen, we call the first thing a cause or effect?

• cause

• effect

• none of these

The thing that happens as a result is called a cause or effect?

• effect

• cause

• all of the above

What is an ingredient that covers up smells from other ingredients?

• sugar

• salt

• cinnamon

Why are scientist interested in cause and effect?

• They do not want to know what happens.

• It helps explain what happens.

• Cause and effect is confusing.