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8th Grade Exam 6
Test Description: Semester exam review part 6
Instructions: Answer all questions to get your test result.
1) The law of conservation of momentum states that when two objects collide, their combined momentum
A
decreases after the collision
B
cannot be determined after the collision
C
remains the same after the collision
D
increases after
2) What is the term for all the combined forces acting on an object?
A
net energy
B
net force
C
net motion
D
net direction
3) Which is not an action/rection force pair?
A
the force between a rabbit and the ground
B
the force of gravity between a falling object and Earth
C
the force between a bat and a ball
D
the force between two cars at rest
4) What must you know to find the momentum of an object?
A
mass and velocity
B
acceleration and force
C
mass and acceleration
D
velocity and time
5) The amount of a substance does NOT affect ....
A
the temperature of the substance
B
the number of particles that make up the substance
C
the mass of the substance
D
the volume of the substance
6) Energy that is lost during an energy transfer ususally
A
increases order in a system
B
increases disorder in a system
C
reorganizes the system
D
increases energy in a system
7) Insulation is needed to prevent what?
A
the gain of thermal energy inside a building in the winter
B
the unwanted transfer of thermal energy into or out of a building
C
the loss of thermal energy inside a building in the summer
D
the collapse of ceilings in homes
8) Which of the following is NOT rue of a passive solar heating system?
A
it utilizes thick walls and large windows that face south
B
It does not have moving parts
C
It relies on a building's design and materials to use energy
D
It uses pumps and fans to distribute thermal energy
9) obtaining information by using the senses
A
data
B
observation
C
hypothesis
D
scientific methods
10) a possible explanation or answer to a question
A
data
B
hypothesis
C
observation
D
scientific methods
*select an answer for all questions
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