chapter 7 review

What kind of reaction is this:
2H₂ + O₂ --> 2H₂O

• Synthesis
• Decomposition
• Single Replacement
• Double Replacement

What kind of reaction is this:
2H₂O₂ →2 H₂O + O₂

• Synthesis
• Decomposition
• Single Replacement 
• Combustion

Tags

NGSS.MS-PS1-2

What is the main difference between synthesis and decomposition?

• One is negative and one is positive
• One is being combined into something and one is being broken down into something
• One deals with two or more substances and one deals with just one
• The both deal with two or more substances

Tags

NGSS.MS-PS1-5

What type of reaction occurs in a hand warmer

• exothermic
• endothermic

Tags

NGSS.HS-PS1-4

In an exothermic reaction, heat is ...

• taken in or absorbed
• given out or released

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

In an endothermic reaction, heat is ...

• taken in or absorbed
• given out or released 

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Tags

NGSS.MS-PS1-2

A change where one or more new substances are created.

• Physical Change 
• Chemical Change 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Fizzing, foaming, and burning are all examples of

• Chemical change
• Physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What are the products of the chemical reaction pictured?

• CH₄ and CO₂

• CH₄ and O₂

• CO₂ and H₂O

• O₂ and H₂O

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5