Chemical and Physical Changes

Front

What indicates a chemical reaction has occurred?

Back

Formation of a new substance.

Front

Which of the following is not a chemical change?

Back

Food coloring dissolving in water.

Front

What happens in an endothermic reaction?

Back

Heat/energy enters/absorbed by the reaction.

Front

What type of change occurs when baking soda and vinegar combine?

Back

Chemical Change.

Front

What type of reaction occurs in a hand warmer?

Back

Exothermic.

Front

Define a chemical change.

Back

A process where one or more substances are transformed into new substances with different properties.

Front

Define a physical change.

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is an example of a chemical change?

Back

Rust forming on iron.

Front

What is the difference between exothermic and endothermic reactions?

Back

Exothermic reactions release heat, while endothermic reactions absorb heat.