Chemical Reactions Test

What happens in a chemical reaction?

• New atoms are created or destroyed

• Substances interact to form one or more new substances

• Substances change from solid to liquid to gas

• Substances change in appearance but not chemical composition

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The reactants are..

• the substances present when the reaction is complete

• the substances present when the reaction begins

• the properties that change after the reaction

• the energy that is released or stored during the reaction

Tags

NGSS.MS-PS1-1

A solid that forms and settles when two or more solutions are mixed is called..

• Catalyst

• Product

• Precipitate

• Compound

The products are...

• the substances present when the reaction is complete

• the substances present when the reaction begins

• the properties that change after the reaction

• the energy that is released or stored during the reaction

Tags

NGSS.MS-PS1-2

An apple's reaction with orange juice and iron rusting is an example of what?

• Precipitate formed

• Color change

• Temperature change

• Gas is released

Tags

NGSS.MS-PS1-2

An experiment was performed in which a crystalline substance was added to a beaker filled with room temperature water. Which observations are evidence that a chemical reaction took place?

• The crystals dissolve

• A precipitate was formed

• Bubbles began to form within the water

• The bottom of the beaker felt warm to the touch

Tags

NGSS.MS-PS1-2

A sample of metal is heated until it melts and begins to glow red. When it cools, it appears the same color as it did before it was heated. This is evidence that a chemical reaction occurred.

• True

• False

Tags

NGSS.MS-PS1-4

Which of these does not indicate a chemical reaction has taken place?

• Change in color

• Change in shape

• Change in smell

• Change in temperature

Tags

NGSS.MS-PS1-2

A solid and a liquid are mixed in a test tube. Which of the following observations would indicate that a chemical reaction occurred between them? Select all that apply.

• The test tube becomes colder as the substances are mixed

• The mixture changes color to a deep blue

• The mixture remains the same color

• The mixture starts to fizz as a gas is released

Tags

NGSS.MS-PS1-2

Adding yellow food coloring to a bottle of water indicates a chemical reaction.

• True

• False

Tags

NGSS.MS-PS1-2