Physical and Chemical Change Check for Understanding

Which of the following is an example of physical change?

• Mixing baking soda and vinegar together, and this causes bubbles and foam

• A glass cup falls from the counter and shatters on the ground.

• Lighting a piece of paper on fire and the paper burns up and leaves ashes

• Baking a birthday cake for your mother.

Which of the following is an example of chemical change?

• Filling up a balloon with hot air

• Taking a cup of water and freezing it by placing it in the freezer

• A plant collecting sunlight and turning it into food

• Your dog ripping up your homework.

Which change can be easily reversed, physical or chemical?

• Physical
• Chemical

When a new substance is formed with different properties than the original substance it is called a .

• Physical change

• Chemical change

If the chemical properties of a substance remain unchanged and the appearance or shape of a substance changes it is called a .

• Physical change
• Chemical change

Which is an example of a physical change?

• Metal rusting

• Silver tarnishing

• Water boiling

• Paper burning

What characteristic best describes what happens during a physical change?

• The original composition changes

• The original composition stays the same

• Form stays the same

• Mass is lost

Which is an example of chemical change?

• Water freezes

• Wood is cut

• Bread is baked

• Wire is bent

What are three indications that a chemical change has taken place?

• Change in color, formation of a gas, formation of a precipitate, change in temperature, production of light or sound.

• Change in shape, melting, dissolving, breaking, freezing.

• Change in size, boiling, evaporating, condensing, stretching.

• Change in mass, cutting, mixing, filtering, grinding.

What property stays the same during physical and chemical changes?

• Density

• Shape

• Mass

• Arrangement of atoms or molecules