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WorksheetsIAPS Unit D Exam: Energy
Total questions: 17
Worksheet time: 14mins
Name
Class
Date
1.
Objects of different masses are suspended from a height. Which combination of features will have the greatest gravitational potential energy?
a)
Low mass and low height
b)
Low mass and high height
c)
High mass and high height
d)
High mass and low height
2.
Which statement most accurately describes the Law of Conservation of Energy?
a)
Energy can not be created or destroyed but it can change from one type to another.
b)
Energy is created from the Earth and is destroyed when we use it.
c)
Energy should be saved (conserved) for use in the future.
d)
All forms of energy can be classified as either potential or kinetic.
3.
The efficiency of an average gasoline powered car is about 20%. This means,
a)
The gas tank needs to be 20% filled with gasoline for motion.
b)
The car uses 80% of the energy stored in the gasoline for motion.
c)
The car uses 20% of the energy stored in the gasoline for motion.
d)
The car wastes 20% of the energy stored in the gasoline.
4.
What energy transformation takes place when a radio is plugged in and turned on?
a)
Kinetic to potential
b)
Electrical to sound
c)
Wire to radio waves
d)
Battery to motion
5.
When you open the door to a refrigerator for a minute, what happens?
a)
Thermal energy in the refrigerator is transferred to the air outside the refrigerator.
b)
Thermal energy in the air outside the refrigerator is transferred to the inside of the refrigerator.
c)
The temperature of the air inside the refrigerator decreases.
d)
The temperature of the air just outside the refrigerator increases.
6.
Which units are used for measuring energy?
a)
pounds
b)
meters
c)
degrees Celsius
d)
calories
7.
Which list consists of only renewable energy sources?
a)
solar, nuclear, coal, wind
b)
wind, solar, hydro, tidal
c)
nuclear, petroleum, wind, hydro
d)
petroleum, tidal, solar, biomass
8.
Cory noticed that the hood of the car was hot after driving it for a while. What energy transformation was she noticing?
a)
chemical energy ➞ thermal energy
b)
thermal energy ➞ motion (kinetic)
c)
temperature energy ➞ braking energy
d)
motion (kinetic) ➞ thermal energy
9.
The following methods will melt an ice cube quickly, except
a)
hold it in your hand and change hands when one hand gets cold
b)
put it in a glass of room temperature water
c)
put it in an insulating container
d)
break it into pieces and warm up the pieces
10.
Jose had a 200 mL cup of hot chocolate that was 95° Celsius which was too hot to drink. His mother suggested he add some cold milk to cool it off so he added 50 mL of milk which was 5° Celsius. What was the approximate
temperature of Jose’s hot chocolate?
temperature of Jose’s hot chocolate?
a)
95° Celsius
b)
75° Celsius
c)
25° Celsius
d)
5° Celsius
11.
On a summer day, asphalt is hot on your bare feet because the asphalt has __________ heat from the sun.
a)
absorbed
b)
transmitted
c)
reflected
d)
scattered
12.
Putting reflecting films on your car windows helps keep the interior cool by
a)
absorbing sun light
b)
transmitting sunlight
c)
reflecting sunlight
d)
scattering sunlight
13.
Metals can be compared based on their reactivity. Look at the table below and predict which pair would produce the most energy when used together in a chemical battery.
a)
magnesium and copper
b)
magnesium and zinc
c)
iron and copper
d)
zinc and copper
14.
Is an incandescent light bulb more or less energy efficient than a fluorescent one?
a)
more
b)
less
c)
they have the same efficiency
d)
it is impossible to tell
15.
Solar energy is free energy from the sun, so why is it not used more as an energy source?
a)
equipment for collecting solar energy is expensive
b)
equipment is not efficient
c)
not all areas of the country receive a lot of sunlight
d)
All of these
16.
Alex has a string of lights that are not working. She tried replacing the battery and the string still does not light. She tried replacing the bulbs one at time. After a few a replacements, all the lights turned on. Is her string of lights wired in series or parallel?
a)
Her lights must be a series because one bad bulb cut the flow of energy from the battery
b)
Her lights must be a parelle because one bad bulb cut the flow of energy from the battery
c)
None of these
d)
You can't tell which one it is based on the evidence given.
17.
1. Jake’s family decided to purchase a solar hot water heater. They were debating about where to place the photovoltaic panels. They wanted to place them in a place that will maximize their use. They were considering the following features: • Height from ground • Angle towards the sun • Area • Number • Efficiency • Shape. Which features should not be considered?
a)
Jake’s family could consider all of the features except the height from the ground and shape because changing them won’t influence how much of the sun’s energy is absorbed
b)
Area and angle towards the sun
c)
Efficiency
d)
Number and efficiency
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