Physical and Chemical Change Review

Physical and Chemical Change Review

Multiple Choice

Which best demonstrates a chemical change has taken place?

• a window breaking into many glass pieces

• warm water cooling to room temperature

• an aluminum can being crushed

• rust forming on a metal pipe

Multiple Choice

Pink powder is added to water, and the result is a red liquid. What kind of change has occurred?

• physical

• chemical

• gaseous

• nuclear

Multiple Choice

What would a teacher most likely use this image to explain?

• Heat being added and taken away is causing physical changes in water.

• Air being added and taken away is causing physical changes in water.

• Heat being added and taken away is causing chemical changes in water.

• Air being added and taken away is causing chemical changes in water.

Multiple Choice

Principal Green walked outside to replace the school's flag. When he took down the old flag, he noticed it had been damaged by the sun. How had it most likely been changed?

• The flag was larger.

• The flag was smaller.

• The flag's colors were brighter.

• The flag's colors were the dull and faded.

Multiple Choice

Which is the best example of a change that can be undone?

• clay put in an oven to harden

• cake batter put in an oven to bake

• chocolate left in a warm car to melt

Multiple Choice

Which best describes an activity that results in a new material being formed?

• plowing a field

• ironing a shirt

• burning wood

Multiple Choice

Brad accidentally left his crayon box in the car on a hot day. Which best explains what happened to his crayons.

• crayons melted; changed from solid to liquid

• crayons melted; changed from liquid to solid

• crayons evaporated; changed from liquid to solid.

Multiple Choice

Anna is doing a science experiment. She mixes 1 cup of hot water with 2 cups of salt. What will most likely happen to the substances?

• The water and salt will blend, and their properties will be changed.

• The water and salt will blend, but their properties will be unchanged.

• The water and salt will not blend, but their properties will be changed.

Multiple Choice

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.

Multiple Choice

A glass of water is placed outside during a hot day. After a few hours, someone notices that there is less water in the glass. Which best explains why this happened?

• water melted; gas formed

• water evaporated; gas formed

• water evaporated; liquid formed

Multiple Choice

Which example best describes a physical change?

• baking a pie

• burning a candle

• making a paper airplane

Multiple Choice

Jennifer left her bike outside, buried in snow. In the spring, when the snow melted, she found her nike covered in rust. Which best describes the change to the bike?

• It was a chemical change, because the bike was a different color.

• It was a chemical change, because the rubber tires were deflated.

• It was a chemical change, because rust can be removed from the metal.

• It was a chemical change, because rust is a new substance on the metal.