Chemical reactions

Why is boiling not a chemical reaction?

• substances change into a new substance

  
  

• substances change but can be changed back again

  
  

•  substances are heated

  
  

Tags

NGSS.MS-PS1-4

Why is photosynthesis a chemical reaction?

• substances change into a new substance

  
  

• substances change but can be changed back again

  
  

•  substances are heated

  
  

Tags

NGSS.MS-LS1-6

NGSS.MS-PS1-5

Plants use carbon dioxide gas and water to form oxygen and a sugar called glucose.

The reactants in the chemical reaction are

• carbon dioxide

• glucose sugar

• water

• oxygen

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Plants use carbon dioxide gas and water to form oxygen and a sugar called glucose.

The products are

• carbon dioxide

• glucose sugar

• water

• oxygen

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Iron reacts with sulfur to form iron sulfide

The reactants in the chemical reaction are

• Iron

• sulfur

• iron sulfide

Tags

NGSS.MS-PS1-2

Iron reacts with sulfur to form iron sulfide

The product is

• Iron

• sulfur

• iron sulfide

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Iron reacts with sulfur to form iron sulfide

Why this is a chemical reaction?

•  a substance changes into a new substance

  
  

•  a substance changes, but can be changed back again

•  a substance is heated

  
  

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When cooking gas burns in oxygen, carbon dioxide and water are formed. Which is a reactant?

• water

• oxygen

• heat

Tags

NGSS.MS-PS1-2

When cooking gas burns in oxygen, carbon dioxide and water are formed. Which is a product?

• water

• oxygen

• heat

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When cooking gas burns in oxygen, carbon dioxide and water are formed. Which are products?

• water

• oxygen

• heat

• cooking gas

• carbon dioxide

Tags

NGSS.MS-PS1-2