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7th Grade - 2nd Term Exam Pt. 1
Test Description: Questions 1-10 cummulative 1st semester exam
Instructions: Answer all questions to get your test result.
1) An example of a change of state is __________.
A
rusting
B
folding paper in half
C
dissolving
D
evaporation
2) The _________ is an example of a physical change.
A
all answers are physical changes
B
melting of chocolate
C
folding a piece of paper in half
D
freezing of water
3) Which of the following is an example of a chemical change?
A
sublimation
B
evaporating
C
burning
D
melting
4) Which of these indicates that a chemical change has taken place?
A
release of heat energy
B
dissolving of a solid
C
change from a liquid to a gas
D
change in shape
5) A ____ is an example of a compound machine.
A
shovel
B
wheel and axle
C
baseball bat
D
lawnmower
6) ___________ is a moving inclined plane.
A
elevator
B
see-saw
C
escalator
D
wedge
7) All of these are simple machines EXCEPT .
A
Wheel
B
Pulley
C
Inclined Plane (ramp)
D
Bicycle
8) What is one way in which simple machines make work easier?
A
improving the quality of axles used in cars
B
creating the need for more workers
C
decreasing the amount of force necessary to complete a task
D
eliminating the need for workers to apply any force when completing tasks
9) A solution with a pH of 13 is a ____.
A
strong base
B
strong acid
C
weak acid
D
weak base
10) How do Newton’s laws help scientists understand more about the physical world?
A
Scientists use these laws to study electricity and magnetism.
B
Scientists can now improve the scientific method.
C
Scientists use these laws to make predictions about the motion of objects.
D
Scientists can now study concepts without having to make measurements.
*select an answer for all questions
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