Name 2 things that we can do to save energy.
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What is energy?
The ability to do work,
T o F : Energy can neither be created nor destroyed
True
Where can we find energy?
Everywhere
Give 2 examples of food that provides energy.
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Name an example of enviromental problems due to certain types of energy.
Carbon dioxide into the atmosphere due to burning fossil fuels; acid rain due to air and water pollution; global warming, etc
What do we mean when we say that energy can be transfered?
That energy moves from one location to another.
Name an example of non-renewable energy.
Nuclear, oil, gas, coal, petrol.
Name an example of renewable energy.
Sun, wind, water, thermal, etc
What types of energy are present in the following example?
"A falling object speeding up"
Gravitational Potential Energy to Kinetic Energy
What do we mean when we say that energy is conserved?
That the total amount of energy always remains the same.
What types of energy are present in the following example?
"Photosynthesis in Plants"
Solar Energy to Chemical Energy
Which are the properties of energy?
Transformed, transported, transfered.
What types of energy are present in the following example?
"Turning on an electric lamp"
Electric Energy to Heat and Light Energy
Name 5 types of energy.
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What is a source of energy?
A source from which usful energy can be extracted either directly or by conversion or transformation process.
Give an example of energy in plants.
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What is non-renewable energy?
Energy that is consumed faster than they can be replaced. One day they will run out. .
What types of energy are present in the following example?
"Using battery-powered torchlight"
In the battery: Chemical to Electrical Energy
In the bulb: Electrical to Radiant Energy
What is renewable energy?
Continuously recovered and will never run out
What is a secondary energy resource?
All the products that are the result of transforming primary energy resources. Ex. Windmill, solar panel.
What do we mean when we say that energy can be transformed?
That energy can change from one type of energy to another.
Name 3 types of energy that comes from the nature.
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What is a primary energy resource?
Energy coming from a natural energy source without transformation. Ex. Crude oil, firewood, water in dams.