Chemical and Physical Changes

Front

Which of the following is an example of a chemical change?

• water freezes to form ice
• sugar dissolves in water
• gasoline burns in a car engine
• a piece of metal expands when it is heated

Back

gasoline burns in a car engine

Front

A change in the shape of an object is an example of _________________.

Back

a physical change

Front

Which of the following is an example of a chemical change? Options: rusting of a bicycle, painting a house, washing a dog, tearing up a newspaper

Back

rusting of a bicycle

Front

What indicates a chemical reaction has occurred?

• dissolving
• melting
• formation of a gas
• bending

Back

formation of a gas

Front

Which of the following IS a physical change? Options: Getting a haircut, Rusty metal, sour milk, A compound

Back

Getting a haircut

Front

What type of change occurs when a new substance is formed that has different properties from the original substances?

Back

chemical change

Front

A copper penny turning greenish after a few years.

Back

Chemical Change

Front

Which of these is NOT a sign that a chemical change has occurred? Options: A loss of transparency, An unexpected color change, A temperature change, The formation of a precipitate

Back

A loss of transparency

Front

An gel ice pack getting cold after you put it in the freezer for an hour.

Back

Physical Change

Front

The smell made from spraying perfume on yourself.

Back

Physical Change