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