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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
Geology and chemistry
B
Biology and physics
C
Chemistry and Biology
D
chemistry and physics
2) The difference between speed and velocity is that
A
velocity has direction while speed does not
B
speed involves time, while velocity does not
C
speed has direction while velocity does not
D
velocity involves time, while speed does not
3) Mass is
A
a measure of the amount of space something takes up
B
dependent on gravity
C
different on the moon than on Earth
D
does not change at all
4) When you wind a rubber band on a toy airplane, what type of energy does the ruber band have?
A
thermal energy
B
elastic potential energy
C
mechanical energy
D
Kinetic energy
5) When a bowling ball collides with a bowling pin, the momentum of the ball
A
decreases slightly as the velocity of the pin decreases
B
decreases slightly as the velocity of the pin increases
C
does not change at all
D
decreases
6) When a train increases its velocity its momentum
A
increases
B
remains unchanged
C
decreases
D
is transfered to its surroundings
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
eventually come to a stop
B
accelerate
C
change its momentum
D
remain in motion
9) How many pathways are there for moving charges in a series circuit?
A
Three
B
Two
C
Four
D
One
10) Which of the following choices best represents force?
A
A push or a pull acting on an object
B
A push or a pull always causing motion
C
A push or a pull acting without an object
D
A push or a pull always causing acceleration
11) When you eat fruit and vegetables, what type of energy are you taking in?
A
sound
B
thermal
C
chemical
D
electrical
12) Which of the following is always a safety rule?
A
Work as fast as possible
B
always follow your teacher's instructions
C
never light a fire
D
take shortcuts if they are not dangerous
13) At the end of an experiment what must you draw?
A
a pciture
B
a conclusion
C
a chart
D
a bar graph
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
5 N south
B
5 N north
C
50 N north
D
15 N north
15) When the net force is equal to 0 N the forces are considered to be
A
unbalanced
B
balanced
16) What is an object that appears to stay in place taht helps you dteect motion in another object?
A
a black hole
B
a reference point
C
a newton
D
a lubricant
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
velocity and time
B
acceleration and time
C
distance and time
D
motion and time
19) Greg applies a force of 100 N to move a box 5 meters. How much work did he do?
A
500 N
B
100 J
C
5 J
D
500 J
20) What is a switch that automatically opens if the current is too high?
A
insulator
B
circuit breaker
C
Box switch
D
conductor
*select an answer for all questions
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