G4: matter revision ..By Mr Magdy Khalaf

Objects can be sorted into groups using properties. What is a physical property of an object?

• something that can be measured without changing the composition of an object

• the name of the person who owns the object

• the distance between a person and the object

• something that can be observed when an object is changed into a new substance

Latifa makes a tower out of six identical plastic blocks. Then she uses a pan balance to measure the mass of the tower. She finds that the tower’s mass is 72 g. What is the mass of each block?

• 10

• 11

• 12

• 13

Malik puts seven identical blocks on a balance. He finds that their total mass is 42 g. He then removes three blocks and measures the remaining mass. What most likely is the mass of the remaining blocks?

• 18 g

• 32 g

• 24 g

• 28 g

The three states of matter are solid, liquid, and gas. Which process changes water vapor into liquid water?

• condensation

• melting

• freezing

• evaporation

The three states of matter are solid, liquid, and gas. Which process changes liquid water into water vapor ?

• condensation

• melting

• freezing

• evaporation

The three states of matter are solid, liquid, and gas. Which process changes ice into liquid water ?

• condensation

• melting

• freezing

• evaporation

The three states of matter are solid, liquid, and gas. Which process changes liquid water into ice ?

• condensation

• melting

• freezing

• evaporation

Maya placed an ice cube on a plate. The ice cube changed from a solid to a liquid. What happened to the amount of matter in the ice cube?

• It doubled

• It decreased slightly

• It stayed the same.

• It tripled.

Daniel has a pot full of water. He knows that water can change states when energy is added or removed. Which of the following actions would add energy to the pot of water?

• placing the water in the freezer

• heating the water on the stove

• leaving the water outside on a cold night

• pouring the water into a larger container

Water changes states when energy is added or taken away. What happens to liquid water when energy is taken away?

• It melts into a liquid

• It freezes into a solid

• It evaporates into a gas

• It condenses into a liquid.