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8th Science Midterm Review
Test Description: Review over chemistry, motion, and energy
Instructions: Answer all questions to get your test result.
1) What is weight?
A
The effect of gravity on the mass of a substance
B
How much mass an object contains
C
How many particles are contained in a unit of volume
D
How much time an object is at rest on the surface of a planet
2) What is friction?
A
A force that causes all objects in the universe to be attracted to eachother.
B
An opposing force that resists the motion of an object.
C
A resistance to a change in motion.
D
A force that increases the speed of an object.
3) What is the relationship between Kinetic and Potential energy?
A
As Kinetic energy increases, so does its potential energy.
B
As Kinetic energy increases, Potential energy decreases.
C
As the mass of an object increases, so does it's energy.
4) What 2 factors effect the strength of the force of gravity?
A
size and shape
B
Mass and weight
C
mass and distance
D
mass and volume
5) Which is an example of chemical to thermal energy
A
A match
B
throwing a football
C
a flashlight
D
The sun
6) Which type of energy transformation is occurring when digesting food?
A
Chemical to Potential
B
Chemical to Thermal and Mechanical
C
Chemical to electromagnetic
D
Mechanical to thermal
7) What are 3 ways an object can accelerate?
A
Go up, down, and backwards.
B
Slam on brakes, bounce up and down, go in reverse
C
speed up, slow down, change direction
D
Slide, roll, and turn.
8) Which type of heat transfer ocurrs when you rub your hands together?
A
Mechanical to thermal
B
Thermal to chemical
C
Kinetic to potential
D
Thermal to Mechanical
9) Which of the following is an example of a compound?
A
Nitrogen
B
Oxygen
C
Soil
D
Salt
10) How many atoms are in a molecule of water (H2O)
A
3
B
2
C
4
D
1
11) Which of the following is an example of Velocity?
A
An object traveling North at 30 mph
B
An object traveling at a constant speed.
C
An object flying straight up.
D
An object turning right at 30mph
12) Which statement describes the motion of particles in a solid.
A
moving freely and occupying all space available.
B
Tightly packed but moving past eachother
C
Moving freely but in a fixed volume
D
Tightly packed in a fixed position.
13) Which statement describes the motion of particles in a gas.
A
Moving freely but in a fixed volume
B
Tightly packed but moving past eachother
C
Tightly packed in a fixed position.
D
moving freely and occupying all space available.
14) Which of the following is an example of a physical property of matter?
A
ability to react
B
ability to rust
C
Density
D
Ability to burn
15) All of the following are examples of chemical changes of matter exept
A
Burning leaves
B
Baking Soda and Vinegar reacting.
C
Rusting Iron
D
Cutting wood in half
*select an answer for all questions
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