Science Quiz on Changes and Mixtures

What is a physical change?

• A change that results in new materials

• A change in the state of matter without altering its composition

• A change that creates a new material with different properties

• A change that destroys matter

What happens to water molecules during boiling?

• They disappear.

• They lose energy.

• They gain energy and change state.

• They turn into a solid.

At what temperature does water freeze?

• -1°C

• 0°C

• 50°C

• 100°C

Which is true about the melting point of iron?

• It is 0°C.

• It is 1583°C.

• It is 100°C.

• It cannot be determined.

What is evaporation?

• A liquid turning into a gas

• A solid turning into a liquid

• A gas turning into a liquid

• A gas turning into a solid

What is condensation?

• A liquid changing to a gas

• A gas changing to a liquid

• A solid changing to a gas

• A liquid changing to a solid

What causes water to appear on the outside of a cold glass?

• Water leaks from the glass.

• Water vapor in the air condenses.

• The ice melts faster.

• The temperature of the glass increases.

Which of these is a chemical change?

• Cutting wood

• Melting ice

• Burning wood

• Breaking a stick

What is a chemical reaction?

• A process where physical changes occur

• A process where a new substance is formed

• A reversible process

• A process with no change in properties

What happens in a conservation of matter?

• Matter is destroyed.

• Matter increases.

• Matter changes form but the total amount remains the same.

• Matter is created.