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WorksheetsChs. 11-14 iLEAP Review
Total questions: 15
Worksheet time: 15mins
Name
Class
Date
1.
The diagram shows a periscope, a tool used to see objects not in the viewer's direct line of sight.
If you want to build a periscope, what measurement is most important?
If you want to build a periscope, what measurement is most important?
a)
the width of the two mirrors
b)
the distance between the two mirrors
c)
the angle of the two mirrors
d)
the length of the tube
2.
Which of the following groups of electromagnetic waves is listed correctly in order of increasing energy?
a)
x-rays, visible light, radio waves
b)
radio waves, visible light, x-rays
c)
infrared rays, visible light, radio waves
d)
visible light, gamma rays, x-rays
3.
How would you tell if an object transmits most of the light that strikes it?
a)
it is translucent
b)
it is transparent
c)
it is opaque
d)
it is black
4.
You view an American flag through sunglasses that are tinted green. What colors do you see?
a)
green and blue
b)
red and black
c)
blue and red
d)
black and green
5.
The table shows the input work and output work for four different pulleys. Which pulley has the highest efficiency?
a)
fixed pulley A
b)
fixed pulley B
c)
movable pulley
d)
block and tackle
6.
Why does it take more work to carry a 22-N bag of birdseed to the third floor of a house than it takes to move a 16-N bag of cat food to the second floor of a house?
a)
work equals distance divided by force and the birdseed requires less force to lift it
b)
The force exerted on the birdseed is not the direction of motion
c)
The cat food has less mass than the birdseed
d)
The birdseed has greater mass and has to be moved farther
7.
Which explains why your output work can never be greater than your input work when you use a machine?
a)
machines make work easier
b)
machines do not reduce the work you do
c)
machines do not exert force
d)
machines make the input work and output work the same
8.
Study the table. Then choose the list that correctly ranks each country's ecological footprint per person, from least to greatest.
a)
China, Germany, Mexico, United States
b)
United States, Mexico, Germany, China
c)
China, Mexico, Germany, United States
d)
Mexico, China, United States, Germany
9.
How do conservation practices affect natural resources?
a)
they cause existing natural resources to last longer
b)
they increase Earth's natural resources
c)
they increase people's ecological footprint
d)
they cause natural resources to be depleted
10.
In some areas, foresters plant one tree for every tree they cut. This activity is an example of
a)
a sustainable approach to a renewable resource
b)
an unsustainable approach to a renewable resource
c)
a sustainable approach to a nonrenewable resource
d)
an unsustainable approach to a nonrenewable resource
11.
Coal is what kind of energy resource?
a)
inexhaustible
b)
renewable
c)
recyclable
d)
nonrenewable
12.
Which of the following is a renewable resource?
a)
oil
b)
coal
c)
natural
d)
wood
13.
How does a nuclear power plant produce energy?
a)
with solar panels
b)
through nuclear fission reactions
c)
with geothermal heat
d)
through nuclear meltdown reactions
14.
How does increasing the efficiency of energy use help to preserve energy resources?
a)
by increasing the energy resources available
b)
by doing less work while giving off more heat
c)
by using less energy to do the same amount of work
d)
by increasing the amount of energy needed to generate electricity
15.
Which is the best scientific definition of a machine?
a)
a machine is a timesaving device that uses motors and gears
b)
a machine changes the amount of input force
c)
a machine makes work easier by changing force, distance, or direction
d)
a machine can either be simple or compound
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