Worksheets2.3 Mastery Check
Total questions: 11
Worksheet time: 6mins
Name
Class
Date
1.
Can matter disappear?
a)
Yes
b)
No
2.
What happens when something burns?
a)
atoms are destroyed and released as smoke
b)
atoms rearrange to form water vapor and carbon dioxide
3.
What is energy?
a)
The ability for matter to change
b)
The electricity that powers everything
4.
What is chemical energy?
a)
Energy that is stored in the bonds of molecules
b)
Energy from living things
5.
Where does the energy from a flame come from ?
a)
ONLY the air
b)
the high energy bonds in molecules
6.
All molecules have high energy bonds
a)
true
b)
false
7.
When we burn something, we see the energy released as
a)
heat
b)
light
c)
motion
d)
all the above
8.
List an example of a type of energy we talked about in class
4 lines
9.
What is the law of conservation of mass?
a)
Mass can be created or destroyed
b)
Mass is neither created nor destroyed in a chemical reaction
10.
Which of the following is an example of a chemical change?
a)
Melting ice
b)
Burning wood
11.
What is released when a chemical bond is broken?
a)
Energy
b)
Matter
100 %
