WorksheetsChemical reactions
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Which observation(s) might be used as evidence that a chemical reaction occurred?
a)
Color change
b)
Odor change
c)
Properties change
d)
All of the above
2.
_________ is (are) made of more than one atom.
a)
A molecule
b)
Protons
c)
Neutrons
d)
An element
3.
________ result(s) in no new substances.
a)
A physical change
b)
A chemical change
c)
Physical and chemical changes
d)
None of the above
4.
Which is an example of a physical change?
a)
Burning wood
b)
Freezing water
c)
Rust on a car
d)
Cooking food
5.
Which is an example of a chemical change?
a)
Burning wood
b)
Rust on a car
c)
Cooking food
d)
All of the above
6.
If you start a chemical reaction with 5 atoms of helium, how many atoms will you have after?
a)
4 atoms
b)
10 atoms
c)
1 atom
d)
5 atoms
7.
Which of the following are properties of matter?
a)
Magnetism
b)
Color
c)
Odor
d)
All of the above
8.
Which of the following help a chemical reaction to happen faster?
a)
Molecule
b)
Atom
c)
Catalyst
d)
Density
9.
Is TNT exploding a physical or chemical change?
a)
Physical
b)
Chemical
c)
Both physical and chemical
d)
Neither physical nor chemical
10.
What kind of scientist forms new materials by studying chemical reactions?
a)
Chemical engineer
b)
Materials scientist
c)
Pharmacist
d)
Medical doctor
100 %
