What do scientists think the origin of all the energy in the universe is?
The big bang
100
Name one type of fossil fuel
Coal, oil, or natural gas
100
Where does the energy I. Food originally come from?
The sun
200
Potential energy found in food
Chemical
200
What forms of energy are found in an electric kettle?
Electric, thermal, sound, light
200
A light bulb turns on: trace the energy as it was transformed starting with when you flipped on the switch
Mechanical to electrical to light and heat
200
Which uses more energy:a) playing half court basketball for 1 hour b) playing a video game for 1 hour
Give an explanation for 50 extra points
A)
200
What organelle in the body transforms energy in food to a form your body can use?
Mitochondria
300
Which has more energy: a) 5liters of water at 60C or b) 50liters of water at 10C? Give an explanation for an extra 50 points
B
300
How does the energy in water change as it moves from solid to liquid to gas?
Energy increases
300
What kind of energy is converted to electricity in wind energy?
Mechanical (wind turning the turbine)
300
What are advantages of using fossil fuels?
Accept answers related to improving everyday life/convenience
300
true or false: water doesn't have energy
False: water has enegy, but our bodies can't use it
400
What is the definition of energy?
The ability to do work or cause a change in something else.
400
True or false: cold things don't have energy
False
400
What happens to energy in a system as friction is introduced?
Energy decreases
400
What are some problems associated with using fossil fuels?
Increased green house effect/ global warming/ pollution
400
To climb a mountainuses 800 units of energy per hour. How many hours can someone climb a mountain using the energy only from a meal that consists of 1600 units of energy?
2 hours
500
Name an object and give at least three forms of energy you can find in it.
Accept appropriate answer
500
Explain how a car moves in terms of the energy in the system
Chemical energy in gasoline, mechanical energy of stepping on the accelerator, thermal energy from combustion in the engine, mechanical enegy in the wheels
500
How do nuclear power plants work? What are some benefits? What are some dangers?
Nuclear power plants use atomic fission (they split atoms and use that heat energy). Benefits are that they release little pollution. Dangers are accidents and radiation leaks
500
True or false: most most energy in food is converted to heat in our bodies