WorksheetsChemistry
Total questions: 13
Worksheet time: 7mins
Name
Class
Date
1.
What is a reactant?
a)
The starting substance
b)
The ending substance
2.
What is a product?
a)
The starting substance
b)
The ending substance
3.
Using the following chemical reaction
Hydrogen + Oxygen --> water
Identify the reactant(s).
Hydrogen + Oxygen --> water
Identify the reactant(s).
a)
Hydrogen and Oxygen
b)
water
4.
Using the following chemical reaction
Hydrogen + Oxygen --> water
Identify the product(s).
Hydrogen + Oxygen --> water
Identify the product(s).
a)
Hydrogen and oxygen
b)
water
5.
Angelina mixes 2 substances together in a beaker. The beaker becomes hot and the liquid changes color.
Did a chemical reaction occur?
Did a chemical reaction occur?
a)
yes, because the properties changed and a new substance was made.
b)
no, because the properties did not change.
6.
Which of the following are NOT signs that a chemical reaction occured?
a)
the properties changed
b)
bubbles of gas formed
c)
color stays the same
d)
smells different
7.
What is a precipitate?
a)
a change in color
b)
a change in temperature
c)
a solid formed
d)
a gas formed
8.
Alex wants to mix two substances together and to find out if a chemical reaction happens. What should he do?
a)
test the solubility before and after mixing
b)
measure the volume before and after mixing
c)
measure the mass before and after mixing
d)
test the density of the before substance but not the after substances.
9.
a student mixes apple juice, water, and cinnamon together. Did a chemical reaction occur?
a)
Yes, because the apple juice changed the color of the water.
b)
yes, because the temperature stayed the sam
c)
no, because the properties stayed the same.
d)
yes, because dissolving is always a chemical reaction.
10.
Burning is always a chemical reaction.
a)
True
b)
false
11.
Sandra was burning a vanilla candle. Was there a chemical reaction?
a)
no, because burning is never a chemical reaction.
b)
Yes, because the properties of the wick changed.
c)
yes, because heat was added.
d)
no, because the ash formed was a different substance.
12.
Which of the following is NOT a chemical reaction?
a)
burning a marshmallow in a campfire.
b)
a campfire
c)
acid rain turning a copper roof green.
d)
Dissolving red Koolaid in water.
13.
Which of the following is a chemical reaction?
a)
Burning bread in the toaster.
b)
melting wax in a microwave.
c)
dissolving salt in water
d)
boiling water to make steam.
100 %
