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Semester 2 Final
Test Description: Chapter 3,4
Instructions: Answer all questions to get your test result.
1) When a force is applied to an object it may:
A
start an object moving.
B
change the direction of a moving object.
C
stop an object’s motion.
D
All of the above
2) The ratio of output force to input force is called:
A
energy.
B
simple machine.
C
mechanical advantage.
D
technology.
3) All of the following are considered to be simple machines EXCEPT:
A
a bicycle.
B
gears.
C
a ropes and pulley.
D
a ramp.
4) Any action that is able to change the motion of a body is called a _________.
A
friction
B
force
C
weight
D
newton
5) An object at rest tends to stay at rest and an object in motion tends to stay in motion in a straight line summarizes a portion of Newton’s __________________ law.
A
third
B
second
C
first
D
unbalanced
6) A force that slows down a car _________________.
A
weight
B
force
C
newton
D
friction
7) The ______________ is the English unit of weight equal to about 4.448 newtons.
A
friction
B
newton
C
force
D
pound
8) If the forces on an object all cancel out so the total force is zero, the forces are called ______________.
A
first
B
unbalanced
C
second
D
balanced
9) Gravitational force on the Moon is more than gravitational force on Earth.
A
false
B
true
10) A telescope that uses mirrors instead of lenses to focus distant light at the focal point is known as a reflecting telescope.
A
false
B
true
11) Jupiter, Saturn, Uranus, and Neptune are composed mostly of gases.
A
true
B
false
12) Which of the following is classified as an inner planet?
A
Jupiter.
B
Saturn
C
Mercury.
D
Uranus.
13) Which of the following is classified as a gas planet?
A
Jupiter.
B
Mercury.
C
Mars.
D
Venus.
14) The planet which appears brightest in the night sky is:
A
Mars
B
Venus
C
Saturn
D
Mercury
15) How do gas planets differ from terrestrial planets?
A
They are more dense.
B
They have thinner atmospheres.
C
They do not fewer moons.
D
They are farther from the Sun.
16) A group of small rocky objects found in a belt between Mars and Jupiter are known as:
A
meteorites.
B
comets.
C
asteroids.
D
meteors.
17) Pieces of rock from space large enough to pass through Earth’s atmosphere and strike the ground are called:
A
meteorites.
B
asteroids.
C
comets.
D
meteors.
18) Ancient astronomers were able to develop early models of the solar system more than 1,000 years ago using:
A
simple telescopes.
B
refracting telescopes
C
satellites.
D
their eyes.
19) The type of telescope using lenses to gather visible light is called a(n):
A
refracting telescope
B
X-ray telecope
C
reflecting telescope
D
radio telescope
*select an answer for all questions
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