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8th Grade Midterm Review
Test Description: Midterm Review
Instructions: Answer all questions to get your test result.
1) What are the two main branches of physical science?
A
chemistry and physics
B
Geology and chemistry
C
Chemistry and Biology
D
Biology and physics
2) The difference between speed and velocity is that
A
speed has direction while velocity does not
B
velocity involves time, while speed does not
C
velocity has direction while speed does not
D
speed involves time, while velocity does not
3) Mass is
A
different on the moon than on Earth
B
dependent on gravity
C
does not change at all
D
a measure of the amount of space something takes up
4) When you wind a rubber band on a toy airplane, what type of energy does the ruber band have?
A
elastic potential energy
B
thermal energy
C
Kinetic energy
D
mechanical energy
5) When a bowling ball collides with a bowling pin, the momentum of the ball
A
does not change at all
B
decreases slightly as the velocity of the pin decreases
C
decreases slightly as the velocity of the pin increases
D
decreases
6) When a train increases its velocity its momentum
A
remains unchanged
B
is transfered to its surroundings
C
decreases
D
increases
7) A crumpled sheet of paper hits the ground before a flat sheet of paper because
A
the crumpled paper is more massive
B
the crumpled paper is less massive
C
the acceleration of gravity is greater on the crumpled paper
D
there is more aire resistance against the flat paper
8) Newton's first law of motion states that a moving object, unless it is acted on by an unbalanced force will
A
remain in motion
B
change its momentum
C
accelerate
D
eventually come to a stop
9) How many pathways are there for moving charges in a series circuit?
A
One
B
Three
C
Four
D
Two
10) Which of the following choices best represents force?
A
A push or a pull always causing motion
B
A push or a pull always causing acceleration
C
A push or a pull acting without an object
D
A push or a pull acting on an object
11) When you eat fruit and vegetables, what type of energy are you taking in?
A
chemical
B
sound
C
electrical
D
thermal
12) Which of the following is always a safety rule?
A
take shortcuts if they are not dangerous
B
Work as fast as possible
C
always follow your teacher's instructions
D
never light a fire
13) At the end of an experiment what must you draw?
A
a chart
B
a bar graph
C
a conclusion
D
a pciture
14) What is the net force on an object when you combine a force of 10 N north with a force of 5 N south?
A
15 N north
B
50 N north
C
5 N south
D
5 N north
15) When the net force is equal to 0 N the forces are considered to be
A
balanced
B
unbalanced
16) What is an object that appears to stay in place taht helps you dteect motion in another object?
A
a newton
B
a lubricant
C
a black hole
D
a reference point
17) Which of the following is the equation for Newton's second law of motion?
A
m=aF
B
M = Fa
C
a=mF
D
F = ma
18) Which of the following are two factors that determine speed?
A
distance and time
B
motion and time
C
velocity and time
D
acceleration and time
19) Greg applies a force of 100 N to move a box 5 meters. How much work did he do?
A
500 J
B
100 J
C
500 N
D
5 J
20) What is a switch that automatically opens if the current is too high?
A
Box switch
B
conductor
C
circuit breaker
D
insulator
*select an answer for all questions
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