Science Test (april 12)

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What's on the test?

True and False

Multiple choices

Short answers

Conduction - contact of energy through touch

Radiation- electromagnetic rays that transfer- sun (lights, oven, fire, people) - doesn't need to be any particles of matter

Convection - The transfer of heat through the liquid - Boiling pot (heat at the bottom, then rotates)

Conduction and Convection- Conduct is through solids, and Convection is through a liquid

Can energy be transferred without matter? No, because there's nothing to touch

What if the earth is unevenly heated? It causes Convection

Light, UV (damages cells), Inferred (Warms up skin, causes burns but doesn't feel hot), Turns into thermal energy)

Why is house cold even if they have heating systems on? It's not Insulated Properly

(Door, Window, Floor, Wall, Attic, Vents and cables are all example

Boiling pot is convection

Hamburger is conduction

Sun's energy is Radiation

4 objects (paper, aluminum foil, sink, counter) - Which one will get hottest first? The counter will get hottest first because the counter is black and dark objects get hotter fast

Dark gets hotter than Light

Why do our feet burn when we walk on the pavement- Because the pavement is dark so it absorbs the suns radiation quickly. (walking on the yellow line on the road will be cooler because yellow is a lighter color)

Why is it warmer in the daytime than nighttime? Because in the daytime, the sun is out so the radiation rays toward the earth and at night the sun goes away so there is no more radiation