Signs of Chemical Reactions

Front

What is a sign of a chemical reaction?

Back

A new (different) substance has formed.

Tags

NGSS.MS-PS1-2

Front

What does the production of bubbles indicate?

Back

It indicates that a chemical reaction is taking place.

Tags

NGSS.MS-PS1-2

Front

Which of the following is NOT an indication of a chemical change?

Back

Shape change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What are some signs that a chemical reaction has occurred?

Back

Evidence includes a precipitate, color change, and temperature change.

Tags

NGSS.MS-PS1-2

Front

How many observations indicate a new substance was formed when a solid is combined with a liquid?

Back

3 observations.

Tags

NGSS.MS-PS1-2

Front

What is a precipitate?

Back

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

Tags

NGSS.MS-PS1-2

Front

What does a color change in a reaction signify?

Back

It often indicates that a new substance has formed.

Tags

NGSS.MS-PS1-2

Front

What is the significance of temperature change in a chemical reaction?

Back

It can indicate that a reaction is occurring, either releasing or absorbing heat.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

What is the definition of a chemical reaction?

Back

A process that leads to the transformation of one set of chemical substances to another.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is an example of a chemical reaction?

Back

Burning wood, which produces ash, smoke, and gases.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5