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