chemical reactions: types and energy

Please choose all the pictures that show a chemical reaction.

• 
• 
• 
• 

Please choose all the pictures that show a chemical reaction.

• 
• 
• 
• 

What is the clue in this picture that tells you that a chemical reaction is happening?

• release of heat

• release of light

• change in odor (smell)

• bubbles are forming

What happens to chemical bonds during chemical reactions?

• Chemical bonds break and reform.

• Chemical bonds do not change.

• Chemical bonds all become ionic bonds.

Please choose the reactants in this chemical equation.

• 
• 

Please choose the products in this chemical equation.

• 
• 

What type of reaction is this?

• synthesis

• combustion

• replacement

• combustion

Which of these is a decomposition reaction?

• 
• 
• 
• 

What type of a reaction is this?

• synthesis

• decomposition

• replacement

• combustion

What type of a reaction is this?

• synthesis

• decomposition

• replacement

• combustion