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7th Grade- Unit 4
Test Description: Physical science part 1
Instructions: Answer all questions to get your test result.
1) Simple machines make work easier for us by
A
doing all the work for us
B
by using output force to increase input source
C
allowing us to push or pull over increased distances
D
by using computers for the work
2) It is common to call the input the
A
load
B
effort
C
virtual work
D
power
3) It is common to call the output the
A
effort or virtual work
B
load or resistance
C
force or leverage
D
friction or power
4) All six of the simple machines have been used for thousands of years and were identified by
A
Italian astronomers drawings
B
Ancient drawings unearthed in ancient Egypt
C
Isaac Newton’s early documents discovered recently
D
Renaissance scientists’ drawings from Greek texts on technology
5) The first class of simple machines includes
A
wheel and axle, wedge, screw
B
pulley, screw, lever
C
lever, inclined plane, wedge
D
lever, pulley, wheel and axle
6) The second class of simple machines includes
A
wheel and axle, screw, lever
B
inclined plane, screw, wedge
C
pulley, inclined plane, wedge
D
lever, pulley, wheel and axle
7) A biface is?
A
a two-sided screw
B
a two-sided stone tool
C
a two-sided wedge
D
a two-sided inclined plane
8) An inclined plane is?
A
a slanting surface connecting a lower lever to a higher level
B
a triangular object that lifts and separates heavy objects
C
simple machine that uses grooved wheels on an axle and a rope
D
a stiff bar or beam that rests on a support called a hinge or fulcrum
9) Mechanical advantage is?
A
the calculation/measure of how much faster/easier a machine makes your work
B
the ability to act or produce an effect
C
the basic mechanical parts used as the building blocks of most machines
D
the assembly of bodies connected together to manage forces and movement
10) A mechanical system is?
A
the shortest distance from the initial to the final position of a point
B
any influence that causes an object to undergo a change
C
the measure of the effectiveness with which a system performs
D
the power to accomplish a task that involves forces and movement
*select an answer for all questions
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