Physical and Chemical Changes

In which can the original substances involved in the change most likely be recovered?

• a piece of iron rusting

• a pan of cookies baking

• a piece of wood burning

• a container of juice freezing

Which example best describes a chemical change?

• an apple turning brown

• wax melting

• a piece of paper being cut into smaller pieces

Which is a way that a piece of paper can go through a chemical change?

• fold the paper in half

• soak the paper in water

• burn the paper with fire

• cut the paper with scissors

Which best explains why burning leaves is a chemical change?

• the leaves emit light during the change

• the temperature of the leaves increases

• the shape of the leaves changes

• the leaves turn to ashes

Ramano is burning wood in a bonfire. What change is occurring during the fire?

• the wood is gaining more mass

• the wood is changing to a liquid

• the wood is dissolving into the ground

• the wood is releasing a gas as smoke

Which best describes why deflating the air from a basketball is an example of a physical change?

• the basketball's shape is changed

• the basketball's color is changed

• the basketball's size is changed

Physical and chemical properties can be used to classify substances. Which of these shows a chemical property?

• silver melts

• magnesium burns

• sulfur is a yellow solid

Ruth left a wax candle in her car for several hours on a warm day. Which describes the change in the candle Ruth most likely observed?

• the candle changed its shape

• the mass of the candle wax increased

• the mass of the candle wax decreased

• the candle changed into a new substance

Which describes a chemical change?

• sugar dissolving in tea

• sunshine warming the sidewalk

• scissors cutting paper into pieces

• acid in the stomach digesting food

Which of these is an example of a new substance being formed?

• a nail rusting

• a wall being painted

• water changing to steam

• paper being folded