WorksheetsPower Plays Checkpoint #2
Total questions: 25
Worksheet time: 13mins
The Law of Conservation of Energy states that energy cannot be
Converted or disguised
Created or destroyed
Conducted or destroyed
Created or disguised
Which of the following is the most important property of energy?
Energy is required for machines to do work
Energy can be renewable or non-renewable
Energy can be changed from one form to another
Energy from the Sun is in endless supply
What can energy do?
Energy makes things happen
Energy causes changes
Energy has the ability to do work
All of the above
Fossil fuels are
Renewable sources of energy
Non-renewable sources of energy
Both renewable and non-renewable sources of energy
None of the above
The main advantage of solar energy over other energy sources is that it
Is unlimited
Can be converted into heat energy
Can be converted into electrical energy
Can be used only during the day
The picture is of a torch. In this device, energy is transformed from
Light to electrical
Chemical to light
Light to chemical
Electrical to light
Energy transformations occurs when
Energy forms matter as in the formation of the universe
One form of energy changes to another energy form in the same object
The form of energy remains the same but is moved from one object to another
Matter transforms to make energy in nuclear reactions
Oil is a natural resource that humans use as a fuel for many applications. Which of the following strategies would NOT be effective in reducing the impacts of obtaining oil from the environment?
The development of alternative fuels made from renewable resources
Humans could make greater use of public transport
Cars could be made smaller and lighter so less fuel was used
Oil drilling could be done in oceans rather than on land
The diagram shows the energy changes that occur when coal is burned in a power station. What percentage of the energy is lost as heat?
10%
20%
50%
60%
The graph shows data about the use of electricity in Australian homes. Which of the following uses the most electricity in Australian homes?
Freezer
Pool
Stand-by
Other
The picture shows an experiment that explores how the Sun heats up different materials. The boxes in the picture are filled with air. Which of the following is the dependent variable in this experiment?
The size of the box
The brightness of the sunlight
The temperature inside the box
The material covering the box
Which of the following is the correct order of energy transformations that take place when a stick of dynamite explodes?
chemical → sound → heat and light
heat → chemical → sound and light
chemical → heat → light and sound
sound → chemical → light and heat
When a person runs, each time a foot hits the ground, energy is stored as elastic energy in the leg. About 90 percent of this stored energy is converted back into kinetic energy as the foot pushes off the running surface. What happens to the other 10 percent of the elastic energy?
It is destroyed in the muscle tissue
It is lost in the form of heat energy
It is converted into mass and makes the muscles bigger
It is converted into chemical energy and stored by the body
What unit of measurement do we use to measure electrical potential energy in a battery?
Volts
Amps
Watts
Ohms
A portable source of electric power is
A battery
A hydroelectric dam
A windmill
Your feet
What is energy?
The ability to do work and cause change and move an object some distance
The push and pull exerted on an object
The relationship between matter and substances
The feeling you get after drinking a Monster or Red Bull
Energy can be __________ from one object to another.
Transported
Teleported
Transferred
Transposed
This form of energy could be represented by the movement of electrons within copper wires.
Electrical
Light
Sound
Mechanical
This form of energy does NOT come from the sun.
Solar
Sound
Light
Thermal
What type of energy is best represented by a battery?
Solar
Sound
Chemical
Thermal
A hockey player uses her stick to hit a hockey puck. Which statement describes the energy transfer?
Energy is transferred from the stick to the puck
Energy is transferred from the player to the puck
Energy is transferred from the puck to the player
Energy is transferred from the stick to the player
Throughout the day, Jamie measure the temperature of lake water as it is warmed by the sun. The table shows the data at four different times. At which time was the thermal energy of the lake water the greatest?
9 a.m.
11 a.m.
3 p.m.
5 p.m.
The tool in the figure shows the temperature on both the Fahrenheit scale and the Celsius scale. What temperature does the tool show on the Fahrenheit scale?
70° F
75° F
80° F
85° F
Efficiency is...
The percentage of energy that is used to do work
The percentage of energy that is lost during work
The stuff in the walls that keeps energy in
Displayed in Sankey graphs
In energy transformations, 'wasted energy' usually takes what form?
Chemical energy
Heat
Light
Sound waves
