Review on Chemical Change

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is evidence of a chemical reaction?

Back

Evidence of a chemical reaction includes the production of a gas, formation of a precipitate, temperature change, and production of light.

Tags

NGSS.MS-PS1-2

Front

What is a chemical property?

Back

A chemical property is a characteristic of a substance that can only be observed during a chemical reaction, such as reactivity with oxygen.

Front

What happens to energy during a chemical reaction?

Back

Chemical reactions are accompanied by changes in energy, which can be absorbed or released.

Tags

NGSS.HS-PS1-4

Front

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

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Tags

NGSS.MS-PS1-2

Front

What is a precipitate?

Back

A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What does it mean when a substance reacts with oxygen?

Back

When a substance reacts with oxygen, it undergoes a chemical change, often resulting in combustion or oxidation.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the significance of new substances in a chemical reaction?

Back

The formation of new substances is a key indicator that a chemical reaction has occurred.

Tags

NGSS.MS-PS1-2

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change, as it changes state but not chemical composition.

Tags

NGSS.MS-PS1-4

Front

What is the role of heat in chemical reactions?

Back

Heat can be absorbed or released during chemical reactions, affecting the reaction rate and the energy of the products.

Tags

NGSS.MS-PS1-6