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