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WorksheetsChemical Reactions
Total questions: 10
Worksheet time: 5mins
A reaction in which energy is released by matter.
endothermic
exothermic
chemical reaction
The process by which one or more substances change to produce one or more different substances.
endothermic
exothermic
chemical reaction
A reaction in which energy is absorbed by matter.
endothermic
exothermic
chemical reaction
Rising dough is a __________________.
physical change
chemical reaction
Chemical reactions occur all around us: in rotting fruit, rusting nails, and baking bread.
True
False
(reactants) --> (_____________)
old molecules
gas
nothing
products
Fireworks are a physical change.
True
False
Which of the following is not an example of a chemical reaction? Select only one!
Rust on a steel object.
Mixing sugar in water.
Vinegar and baking soda.
Burning logs in a fireplace.
Production of light, production of gas, color change, change in temperature, and formation of precipitation are characteristics of a chemical reaction.
True
False
Chemical reactions are either _____________________________.
true or false.
dangerous or safe.
Endothermic and Exothermic.
release water or bubbles.
