CR Lesson 2 Review

Cutting, melting, bending, and crushing are examples of what kind of change?

• Reactant

• Product

• Physical

• Chemical

Tags

NGSS.MS-PS1-4

What kind of change is the formation of rust?

• Reactant

• Product

• Physical

• Chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following can occur when a chemical reaction takes place? Choose all that apply.

• New Bonds Form

• Existing Bonds Break

• New Substances Form

• Changes Don't Affect Matter

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which one is NOT an indicator of a chemical reaction taking place?

• Color Change

• Formation of a Gas

• Change of State

• Transfer of Energy

Tags

NGSS.MS-PS1-2

True or False:

If a reaction produces bubbles it is a chemical reaction.

• True

• False

Tags

NGSS.MS-PS1-2

Which is the best way to be CERTAIN that a chemical change took place?

• Formation of a new substance

• A color change occurs

• Some bubbles form

• The materials do not react

Tags

NGSS.MS-PS1-2

When energy is released as heat it usually an ____________ reaction.

Tags

NGSS.HS-PS1-4

____________ reactions tend to leave their surrounding areas cold.

Tags

NGSS.MS-PS1-4

Select all of the conditions that affect the rate of a chemical reaction.

• Temperature

• Speed

• Concentration

• Surface Area

Tags

NGSS.HS-PS1-5

When you ___________ the number of particles you can __________ the rate of a chemical reaction.

*hint the blank is the same answer for both