CHEMICAL CHANGE

What happens in a chemical change?

• a) Nothing changes

• b) A new substance is formed
  

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  c) The color changes back and forth
  

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  d) The size stays the same

Which of these is an example of a chemical change?

• a) Melting ice

• b) Boiling water
  

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  c) Baking bread
  

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  d) Breaking a pencil

What is rust?

• a) A type of rock
  

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  b) A color
  

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  c) A chemical change in iron
  

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  d) A kind of metal

Which of the following shows a chemical change?

• a) Water freezing into ice
  

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  b) Cutting a piece of paper
  

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  c) Burning wood
  

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  d) Mixing oil and water

When you burn paper, what happens?

• a) The paper changes back to a tree
  

• b) It turns into ashes and smoke
  

• 
  c) It stays the same
  
  

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  d) It melts

Which sign indicates a chemical change has occurred?

• a) It gets colder
  

• 
  b) It stays the same
  

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  c) Bubbles are produced
  

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  d) It looks shiny

What happens when you mix baking soda and vinegar?

• a) They disappear
  

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  b) They make a loud noise
  

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  c) They fizz and bubble
  

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  d) They become solid

Why do we say cooking food is a chemical change?

• a) The food smells good
  

• 
  b) The food looks different
  

• c) The food turns into a new substance
  

• 
  d) The food gets cold

What happens to iron when it rusts?

• a) It melts
  

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  b) It changes color and becomes flaky
  

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  c) It turns into liquid
  

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  d) It evaporates

When you light a candle, what type of change occurs?

• a) Physical change
  

• 
  b) Chemical change
  

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  c) No change
  

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  d) Freezing change