The Earth System Chapter 5 Flashcard

Front

What is a chemical reaction?

Back

A process where new substances are created that are different from what you started with.

Front

True or False: An ice cube melting is a chemical reaction.

Back

False

Front

True or False: All chemical reactions give off heat.

Back

False

Front

True or False: Burning wood is an example of a chemical reaction.

Back

True

Front

What happens to substances during a chemical reaction?

Back

They change into new substances.

Front

What is rust?

Back

Rust is a common example of a chemical reaction that occurs when iron reacts with oxygen and moisture.

Front

What is an example of a physical change?

Back

Melting ice is a physical change, not a chemical reaction.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not create new substances, while a chemical change does.

Front

What is an example of a chemical reaction that occurs over time?

Back

Rust forming on iron.

Front

What is the role of heat in chemical reactions?

Back

Some chemical reactions absorb heat, while others release heat.