Show:
This and That
Energy Efficiency
Bring the Heat
Revisions
Academic Vocab
100
What word do we use to identify the amount of light energy produced by a source?
Lumens
100
A 100W incandescent bulb has high light output and high heat output. Is it energy efficient??
No
100
When heat is easily transferred through materials, we call this...
conduction
100
True or False? If false, rewrite the statement to make it true: A leaf falling from a tree is an example of energy in action.
True
100
What type of energy can be described as energy that is carried by light rays?
Light Energy
200
What is the term we use to describe the amount of electrical energy an item needs in order to work?
Watt (or wattage)
200
A 50W incandescent bulb has low light output and low heat output. Is it energy efficient??
No
200
When heat energy transfers slow down, we call that...
Insulation
200
True or False? If false, rewrite the statement to make it true: A ball sitting on a shelf is an example of energy in action.
False. A ball sitting on a shelf is not an example of energy in action.
200
What type of energy can be described as the energy stored in materials such as food and batteries
Chemical Energy
300
Think about a solar propeller... what order describes the correct energy transfer? Use: motion, light and electrical
light, electrical, motion
300
A 26W CFL bulb has high light output and low heat output. Is it energy efficient??
Yes
300
Heat is not a useful transfer of energy when operating a light bulb, so it is called...
Wasted energy
300
True or False? If false, rewrite the statement to make it true: A stretched out slingshot ready to shoot is an example of energy in action.
False. A stretched out slingshot is not an example of energy in action.
300
What type of energy can be described as energy that electricity provides?
Electrical Energy
400
We know that a 100W incandescent light bulb and a 26W CFL light bulb produce the SAME AMOUNT OF LUMENS, but what is something that is different about them?
They use different amounts of electrical energy. They have different amounts of heat energy. The CFL is energy efficient while the incandescent is not. The CFL contains gas inside the bulb while the incandescent has a filament inside. Answers may vary.
400
Think about the energy transfers in a light bulb. Which energy transfer is an example of wasted energy?
heat energy
400
If you were to add a bag of warm water into a bottle of cold water, what would happen to the temperature of the warm water?
It decreases
400
True or False? If false, rewrite the statement to make it true:Energy is required for change to happen.
True
400
What type of energy can be described as energy present in moving things?
Motion Energy
500
If you were to add a bag of warm water into a bottle of cold water, why would the temperature of the warm water decrease?
Heat energy was transferred from the warm water to the cold water.
500
Provide at least 2 reasons why a 26W CFL bulb is energy efficient.
less electrical energy but large light output. Less wasted energy because it transfers less energy to heat.
500
Name two ways that heat energy can be tranferred
touching, being near
500
True or False? If false, rewrite the statement to make it true: A machine does not use energy transfers to do a specific task.
False. A machine uses energy transfers to do a specific task.
500
What type of energy can be described as energy stored in stretchy objects as they are pulled?
Elastic Energy