Types of Energy Pt. 1
True or False: Sound energy is a form of energy.
True! For example, an explosion is a form of sound energy!
True or False: Bending a paper clip causes heat energy.
True or False: The equation for work is Work = force x density.
False! Work = force x distance!
True or False: Energy can be created and destroyed.
False! Energy cannot be created nor destroyed. It can only be transformed from one form into another.
True or False: We use less fossil fuels today than we have in the past.
False! Since 1900, the amount of fossil fuels burned by people to produce energy has doubled every 20 years!
Chemical Energy is stored in:
A) Coal
B) Wood
C) Oil
D) All of the above.
D) All of the above.
Friction is an example of ______ energy.
Mechanical
Does it take work to lift an apple from the table to your mouth?
Yes! The apple moved, so work was done!
True or False: Mixing chemicals together can create heat energy.
True! If a mixture cools down or heats up, chemical energy has been trandformed into heat energy.
True or False: Countries with large supplies of oil sometimes use it for political power.
True.
Geothermal energy is produced when ______ touches _______ and produces steam that goes through a generator creating electrical energy.
water; hot rocks
True or False: Coal received its chemical energy from that stored in plants.
True!
Al is trying to move a 150 lb dresser. He pushes as hard as he can, but he cannot move the dresser. How much work is done?
None! Work is dependent on distance. Since the dresser did not move, no work was done!
As a biker goes from sitting on top of a hill to rolling down, _______ energy is transformed into _______ energy.
Potential; Kinetic
Are coal and oil renewable or non-renewable resources?
Non-renewable. Coal and oil take so much time to form. We use them at exponentially quicker rates than they are formed. So, they are considered non-renewable.
What two types of energy, besides solar energy, can be received from reflected sunlight?
Heat and light energy!
A pencil sitting on a table ledge has _______ energy.
Potential!
False. Energy is needed anytime work is done.
During photosynthesis, _____ energy from the sun is transformed into chemical energy that plants use as food!
solar/light
Is solar energy easy or difficult to store?
Difficult! Heat (from solar energy) is difficult to store for very long. Storage surfaces around the heat “soak up” the stored heat. This heat is then “wasted” to the surrounding air from the storage surfaces.
Energy found in the sun and stars comes from ______ _______.
Nuclear fusion
The _____ is the main source of energy on earth.
Sun!
If Harriet moves a 50 lb rock 5 ft, how much work is done?
250 foot-pounds. W = f x d. W = 50lbs x 5ft. W = 250 foot-pounds.
Batteries contain ______ energy, which is transformed into ______ energy.
chemical; electrical
We can be a good _________ by caring about our energy sources and using them wisely!