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WorksheetsSigns of a Chemical Reaction
Total questions: 10
Worksheet time: 5mins
What are the following signs of a Chemical Reaction below?
Select Two
Bubbles
Change in Color
change in state
change in shape
You have 2 chemicals, CHEMICAL A and CHEMICAL B. They are both liquids. When you combine them you notice some crystals starting to form within them. Did a chemical reaction occur?
Yes
No
You have a large glass of water and you stir salt into it until all the salt completely dissolves. Is this a chemical reaction?
Yes
No
Which one shows that a chemical reaction has occurred?
Melting
Bending
Dissolving
Formation of a Gas
What is the BEST definition of a chemical reaction?
A change in matter that produces one or more NEW substances
When two things combine and EXPLODE.
What is a chemical reaction?
A very boring change in matter
A change in matter when matter changes its form or appearance
A change in matter when the physical appearance changes
A change in matter when the molecules rearrange to make new molecules
Which example is a chemical change?
Baking powder fizzing
Ice melting
Water boiling
Sugar Cube Dissolving
When vinegar and baking soda are combined, bubbles and foam are produced.
What evidence demonstrates that a chemical change has occurred?
A color change occurs.
A gas is formed.
A solid is dissolved.
A precipitate is formed.
A substance that is formed as the result of a chemical reaction is a __________________
Product
Reactant
Starters
Enders
Is a Change in Color a sign of a Chemical Reaction?
No
Yes
