OpenSciEd 7.1

Front

What is a chemical reaction?

Back

A process where substances (reactants) are transformed into different substances (products) through the breaking and forming of chemical bonds.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What does it mean when we say an ingredient alone does not cause a chemical reaction?

Back

It means that multiple ingredients are often required to interact and produce a chemical change.

Tags

NGSS.MS-PS1-2

Front

What is a phase change?

Back

A transition of matter from one state to another, such as from solid to liquid to gas.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

What happens to gases that are less dense than air?

Back

They rise in a room full of air.

Front

What does a large number in front of a molecule indicate?

Back

It indicates the number of molecules present.

Front

What are the ingredients needed to create a chemical reaction in a bath bomb?

Back

Baking Soda and Citric Acid.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is density?

Back

Density is the mass of a substance divided by its volume, often determining whether it will float or sink in another substance.

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.

Front

What is an example of a physical change?

Back

Melting ice into water.

Tags

NGSS.MS-PS1-4

Front

What is an example of a chemical change?

Back

Burning wood, which produces ash and smoke.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5