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7th Grade Unit 2 Review 2016 Reilly
Test Description: 7th grade unit 2 review 2016
Instructions: Answer all questions to get your test result.
1) Matter cannot be created or destroyed is which law?
A
conservation of energy
B
conservation of volume
C
conservation of light
D
conservation of mass
2) all matter is made of
A
energy
B
life
C
gas
D
atoms
3) if something has a lot of mass
A
It has a low frequency
B
It has a large volume
C
It contains a lot of matter
D
It has a high density
4) How is weight different than mass?
A
Weight is measured in grams; mass is measured in newtons
B
Weight is measured with a scale; mass is measured with a triple beam balance
C
Weight can be converted to energy; mass cannot
D
Weight changes depending on gravity; mass stays the constant throughout the universe
5) the two or more substances that used in a chemical reaction before the reaction happens are called
A
reactants
B
product
C
producers
D
pollutants
6) in a chemical reaction the end result is called
A
reactants
B
producers
C
product
D
pollutants
7) which of the following proves that a chemical reaction has taken place
A
weathering
B
gas formation
C
change in size
8) which of the following proves that a chemical reaction has taken place
A
change in state
B
size change
C
temperature change
9) In a chemical reaction, the atoms that make up the original substances are regrouped into different _________
A
Elements
B
Molecules
C
Atoms
D
Compounds
10) heat energy is also considered
A
Thermal energy
B
Potential energy
C
Light
D
Electric energy
11) potential energy is
A
energy of movement
B
energy of light
C
stored energy
D
stored calories
12) kinetic energy is
A
stored energy
B
stored calories
C
energy of movement
D
energy of light
13) Everything in science wants to be ______
A
smaller
B
neutral
C
bigger
D
equal
14) A measure of the average kinetic energy of the particles in an object is called
A
Kinetic energy
B
Thermal energy
C
temperature
D
Plasma
15) What tool do we use to measure temperature?
A
beaker
B
thermometer
C
graduated cylinder
D
erlenmeyer flask
16) what type of equipment do you use to measure the volume of an irregularly shaped object?
A
beaker
B
graduated cylinder
C
erlenmeyer flask
D
thermometer
17) an endothermic reaction results in
A
no change
B
temperature decrease
C
temperature increase
18) an exothermic reaction results in
A
temperature increase
B
temperature decrease
C
no change
19) what is matter?
A
anything that has mass and takes up space
B
anything that has mass
C
anything that takes up space
D
anything that takes up energy
20) true or false....heat can be lost, destroyed or disappear?
A
false
B
true
*select an answer for all questions
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