Science G5 Revision Term 1 (Topic 2 changes in Matter)

Jamal’s class is observing how different substances are affected by physical

and chemical changes. What evidence might indicate that a chemical change

has occurred? Choose the three correct answers.

• Release of heat

• Change in Temperature

• Color Change

• New smell

Which explains why the mass of X and Y combined is the same mass as the new substance

XY?

• Chemical Change

• Physical Change

• Law of conservation of matter

This explains why the mass of W and Z combined is greater than the mass of the new

substance WZ?

• The reaction destroys matter

• The particles of substance W is attached to substance Z

• The physical change caused the particles to become smaller

• The reaction created a gas that escaped to the atmosphere

The picture of the hammer labeled “After” shows evidence of

• Evaporation

• Freezing

• Rust

• Melting

The Change seen in number 4 is

• Physical Change

• Chemical Change

• Law of conservation of matter

Which statements explain why the mixture shown in the picture is not a

solution? Select only one correct answer.

• The parts can be easily separated.

• The parts are bonded together.

• There are more than two components.

• The parts are spread out evenly.

A group of students placed iron filings and sand in a jar. One student put the lid on

the jar. Another student shook the jar.

What did the group make?

• a particle

• a mixture

• a solution

• a component

A group of students placed iron filings and sand in a jar. One student put the

lid on the jar. Another student shook the jar. One student opens the jar and

pours it into a pan. Another student holds a magnet over the sand and iron

filings. What is the purpose of this procedure?

• to make a mixture

• to create a solution

• to separate the mixture

• to break down the particles

Ben’s aunt mixes some sugar into her hot tea. She stirs the tea until she can

no longer see any sugar particles. What happens to the sugar as Ben’s aunt

stirs her tea?

• The sugar particles attach to the water particles.

• The sugar particles change the color of the water particles.

• The sugar particles and the water particles become evenly spread out.

• The sugar particles and the water particles react to create a new substance.

Drew mixed together with the two materials in the table. What is the mass of the

mixture?

• 450g

• 150g

• 300g

• 200g