Unit 4 Physical and Chemical Changes

Front

What does the Law of Conservation of Mass state?

Back

Matter cannot be gained or lost in a chemical reaction.

Front

What role does chlorophyll play in photosynthesis?

Back

Chlorophyll absorbs light energy from the sun.

Front

What is evidence of a chemical reaction?

Back

Bubbles forming.

Front

What is a chemical property?

Back

A characteristic of a substance that can only be observed during a chemical reaction, such as flammability.

Front

Which of the following is not a chemical property?

Back

Boiling.

Front

What is a physical change?

Back

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

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is flammability?

Back

The ability of a substance to catch fire and burn.

Front

What is photosynthesis?

Back

The process by which green plants use sunlight to synthesize foods with the help of chlorophyll.

Front

What are the signs of a chemical reaction?

Back

Bubbles, color change, temperature change, and formation of a precipitate.