GLG 301 Lecture Notes - Lecture 2: Multimodal Distribution, Energy, Outer Core
Document Summary
See table of same name under supplementary material for january 11. Continents are less dense and contain old crust (up to 4+ billion years); oceans are denser and only have rocks younger than 200 million years. Bimodal distribution of elevation is unique to earth; only planet with plate tectonics. Sea-level is an artifact of the amount of water in the oceans varies over geologic time. Earth processes are a result of energy (heat) transfer (or a change in the distribution of energy) Energy is expressed in terms of heat or work (how much energy something contains) Si: joule (n-m) (tank of gas is ~ 2 x 109 joule) calorie = 4. 2 joules (warm 1 g of. H20 by 1 c) (note: cal in food is actually kcal) Power is the rate of use (or production) of energy. Si: joule/sec = watt hybrid unit kilowatt-hour = 3. 6 x 106 joules (how many watts you have used in an hour?)
