(Blank)
Q: What type of energy does a solar oven use from the sun?
A: Light energy
Q: Which color absorbs the most heat inside a solar oven?
A: Black (black paper)
Q: Name one example of a fossil fuel.
A: Coal, oil, or natural gas
Q: Fossil fuels are non-renewable. What does that mean?
A: They will run out / cannot be replaced quickly
Q: Name one renewable source of energy.
A: Solar, wind, or hydroelectricity
Q: What material inside a solar oven helps reflect sunlight into the box?
A: Aluminum foil
Q: What should you do to make food cook faster in a solar oven?
A: Keep the oven closed OR use small pieces of food
Q: Why is using coal sometimes dangerous for workers?
A: Mining can be dangerous
Q: Why do some communities still use coal today?
A: It’s cheap, easy to transport, and their power plants already run on coal
Q: Why is renewable energy better for the environment than coal?
A: It reduces air pollution
Q: What do you need to build a hydroelectric power system? (Name one item.)
A: A river, dam, reservoir, turbines, generators, or power lines
Q: Why do many developing countries use hydroelectricity first?
A: Rivers are free and easy to access / low cost once built
Q: What is one drawback of hydroelectricity that affects animals?
A: Fish cannot swim upstream
Q: What do we call the distance between one crest and the next crest?
A: Wavelength
Q: What do we call the height of a wave?
A: Amplitude
Q: What is the highest point of a wave called?
A: The crest
Q: Which wave has the longest wavelength: the one with close crests or the one with far-apart crests?
A: The one with far-apart crests
Q: What is the lowest point of a wave called?
A: The trough
Q: What causes most waves you see on the beach?
A: Wind blowing over the water
Q: What happens to a wave when it reaches shallow water?
A: It breaks (because the ocean floor rises)
Q: Name the three science ideas that make a solar oven work.
A: Absorption, reflection, and insulation
Q: What is one environmental problem caused by fracking for natural gas?
A: It may pollute local water resources
Q: If two waves move at the same speed, which one has more energy—the one with a bigger amplitude or smaller amplitude?
A: The one with a bigger amplitude
Q: A big rock is dropped into water. What will happen to the amplitude?
A: It will be large / amplitude increases
Q: Why does placing your solar oven directly in strong sunlight increase its temperature?
A: More light energy is absorbed and converted into heat