Chemical Reaction - 8th Grade

___________________ are the elements or compounds that are formed or produced in a chemical reaction.

• Polymers
• Bonds
• Reactants
• Products

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A change in which NEW substances are formed.

• Chemical change
• Physical change
• Casual change
• Formal change

Is melting an object technically known as a chemical reaction? 

• I don't know
• Yes
• No

Tags

NGSS.MS-PS1-4

Exothermic reactions...

• Absorb energy
• Release energy
• Release Color
• Absorb Color

Tags

NGSS.HS-PS1-4

_________________ are the elements and compounds that react, or start, in a chemical reaction. 

• Polymers
• Bonds
• Reactants
• Products

Which of the following could indicate a chemical change? 

• All of the answers could indicate Chemical Change 
• a color change has occurred 
• bubbles appear 
• identifying one or more new chemical products 

Tags

NGSS.MS-PS1-2

In the equation,  
2Mg + O₂ ---> 2MgO,
which are the reactants?

• Mg and O
• MgO
• Mg and MgO
• O and MgO

Tags

NGSS.MS-PS1-2

 Which is NOT an example of chemical change?

• production of gas.
• change in color.
• change in size.
• transfer of energy.
  

Tags

NGSS.MS-PS1-2

Chemical reactions that release energy are known as ________________________.

• Endothermic
• Exothermic
• Boring
• Reactions

Tags

NGSS.MS-PS1-4

Chemical reactions that absorb energy are known as ________________________.

• Endothermic
• Exothermic
• Boring
• Reactions

Tags

NGSS.HS-PS1-4