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Grade 8 Science: Chemical Reactions & Conservation of Mass
Name
Date
1.
A ___ changes substances into new materials with different properties.
2.
Starting substances in a reaction are called ___.
3.
New substances formed are called ___.
4.
In a closed system, total mass before and after a reaction is ___.
5.
Balancing equations ensures equal numbers of each ___ on both sides.
6.
A color change can be evidence of a ___.
7.
Production of a gas can indicate a ___ occurred.
8.
Formation of a precipitate suggests a ___ reaction.
9.
State the law of conservation of mass.
10.
List three pieces of evidence for a chemical reaction.
11.
What is the difference between reactants and products?
12.
Why is melting butter not a chemical reaction?
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