An Energy Environment
What is the source of almost all energy?
the Sun
What is energy transformation?
when energy changes from one form to another
Where do we get electricity?
It is generated in power plants.
What does energy efficient mean?
Something that needs only a small amount of energy
What is energy conservation?
Saving energy
Name 3 types of energy
heat, electric, fossil fuel, nuclear
What is potential energy?
Energy that is stored to be used later.
What do Nuclear power plants do?
transform energy inside uranium into heat
How do we waste energy? (3 ways)
gas-guzzling cars, not turning off appliances, poor insulation
Name two ways to save energy.
Better insulation, heat recovery systems, planting trees.
What will happen to our energy? What should we do?
It will run out. We need to conserve it.
What happens when potential energy is released?
It changes to kinetic energy
What power plant uses water or tides to make energy?
hydroelectric
What are two ways we can avoid wasting energy?
use hybrid/electric cars, better insulation, turn off appliances.
What is another word for clean sources of energy?
alternative energy
Name 3 natural resources
water, minerals, wind, the sun
Energy cannot be _______, ______, or _______.
created, lost, or destroyed
How do hydroelectric plants work?
it transforms kinetic energy into electric energy
Why should we not waste energy?
We produce a lot of greenhouse gases that harm the environment. It contributes to global warming.
What does harness mean? What do we harness in solar panels?
to use something for a particular purpose. The Sun's rays
How do we waste water? Name 3 ways
leaky pipes, long showers, washing machines, flushing toilets.
Give an example of how energy is wasted
a car engine produces heat and sound energy that are not used
Name three clean sources of energy
sun, wind, water, waves, ocean tides
What is not true about hybrid cars?
A. They use less fuel
B. They are less energy efficient
C. They are often smaller
D. They have two engines.
B
What may we use in the future to make energy? Name 3 things.
wind farms, tidal generators, solar collectors, new car engines