Homework

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 * 1) 20 a) It says in the text, that "Cities are known to be urban heat islands, with temperatures that are often higher than in surrounding rural and natural vegetated areas." I think this states that cities absorb heat energy from the sun, so the albedo would be higher in a city, causing it to be warmer.

b) If I understood the question correctly, It asks "What material would you use to make the plaza colder" In that case, I would use white rock. In the case that I am wrong, I would use asphalt.

c) white rock is... white, therefore it would reflect heat better than the other two because they are darker, and darker objects absorb light better than light objects.

d) Tar.

e) Tar would take longer to cool down, because it would get hotter than the pale shingles, and would therefore take longer to cool.

f) When one brick gets warm, it warms up the bricks beside it. Eventually, the heated bricks at the edge of town warm up the soil around the city. Also, the bricks on the outside heat even the inside of a cooled building.

g) The sun heats the earth, and the earth heats the air above it. The air moves upwards, and is replaced from cool air from elsewhere. The cool air is heated, and is sent upwards. this results in a constant thermal above the city while the city releases it's heat over the night.

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 * 1) 7 Only P-waves
 * 1) 12 Continental drift theory
 * 2) 13 a) Convergent Boundary b) Divergent Boundary c) Transform Boundary (Fault)
 * 3) 14 Because a subduction zones, and divergent boundaries are more direct paths for the magma
 * 4) 15 When mountain ranges separate, they leave clues such as similar geological structures. Scientists can identify if these mountain ranges were together at one time or not.
 * 5) 16 The continents would not drift, and if the core cooled and stopped spinning, the world would stop spinning too
 * 6) 17 Volcanoes spew lava, which is from the earth's core
 * 7) 18 Because plate boundaries are essentially gateways into the core, especially divergent boundaries
 * 8) 19 It would cause a tsunami to rise over the Lower Mainland
 * 9) 20 Because it takes time to prepare for them, and we don't know when they're coming
 * 10) 21 a) Subduction zone b) Volcano c) Upper Mantle d) Crust e) Lower Mantle