Types of Energy
Energy in motion is ___________, and stored energy is ________.
Kinetic, Potential
When you sled down a hill, what energy transformation happens? (use the words kinetic and potential)
Potential energy turns into kinetic energy as you go downhill
Heat transferred through TOUCHING/ DIRECT CONTACT (like a dog sitting on your lap)
Conduction
Coal, oil, and natural gas are called..
fossil fuels/ nonrenewable resources
What is the source for all energy on earth?
The Sun
The _____________ something is, the more potential energy it has. (higher up or lower down)
Higher up
Before winter break when I used my kettle to boil water for hot cocoa, what kind of energy transformation happened?
A. heat energy to electrical energy
B. electrical energy to heat energy
B. electrical energy to heat energy
Heat transferred through a LIQUID OR A GAS (like boiling water or warm air rising)
Convection
Wind, solar, geothermal, biomass, and hydropower are all called
Renewable resources
How much energy is absorbed by the earth?
70%
When we did the ping pong ball lab before winter break, what happened?
A. the kinetic energy turned into potential energy as the ball fell
B. the potential energy turned into kinetic energy as the ball fell
C. no energy transformation happened
B. the potential energy turned into kinetic energy as the ball fell
When you ride the school bus home, what energy transformation is happening?
A. mechanical energy to heat energy
B. heat energy to chemical energy
C. chemical energy to mechanical energy
C. chemical energy (gasoline) to mechanical energy (engine and wheels)
Heat transferred through HEAT WAVES/ EMPTY SPACE (like the sun melting a popsicle)
Radiation
Nuclear energy is not considered renewable or nonrenewable. It is clean and efficient, but has one drawback. What is that drawback?
A. disposing of waste products
B. pollutions/smog
C. takes a lot of space
B. pollutions/smog
C. takes a lot of space
How much energy is reflected from earth?
30%
1. plugging in your phone
2. cooking on the stove
3. splitting an atom
4. the sun's light
5. riding a bike
6. energy stored in food and batteries
7. playing the guitar
1. electrical
2. thermal
3. nuclear
4. radiant
5. mechanical
6. chemical
7. sound
What energy transformation takes place during photosynthesis?
A. electrical energy to radiant energy
B. radiant energy to chemical energy
C. chemical energy to mechanical energy
B. radiant energy (sunlight) to chemical energy (glucose)
Melting ice and Boiling water both involve _______________ energy. (adding heat or losing heat)
adding heat
When we use renewable resources, and capture falling water (gravitational energy), moving wind (mechanical energy), or solar power (radiant energy), what do we transform it into to be able to use?
Electrical Energy (electricity)
What is the greenhouse effect/what does it do?
gases produced on earth that trap heat at Earth's surface.
For each type of energy, tell whether it is kinetic or potential.
1. electrical
2. nuclear
3. radiant
4. chemical
5. thermal
6. sound
7. mechanical
1. Kinetic
2. Potential
3. Kinetic
4. Potential
5. kinetic
6. Kinetic
7. Kinetic
Whenever energy is transformed, is energy created (gained), lost (destroyed), or stay the same?
Stay the same
Condensating and Freezing both involve _____________ energy. (adding heat or losing heat)
Losing heat
Does Virginia and the world as a whole use more renewables or nonrenewables?
Nonrenewables
CO2 is a greenhouse gas. when we burn fossil fuels and release CO2 into the atmosphere, it causes the temperature to (increase or decrease) because it (releases or traps) heat at the surface.
increase, traps