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