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### 6 Cards in this Set

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 what is the theory that explains the slow movement of continents on the Earth's surface? The theory that explains the slow movement of continents on the Earth's surfce is "Plate Tectonics" It means that Earth's plates move ever so slowly in various directions. Give 2 reasons why you don't notice the land moving beneath you? (think of reference points) Two reasons why we don't notice the land moving beneath us is because ew are standing on it s oyou use it as a reference so you don't notice it moving. Also because your standing on it. Suppose you are studing the motion of one of th e Earts plates. What units would you probably use to describe it's speed? If you are studing a plate on Earth the units I would use t odescribe its speed is that it moves so slow and because it doesn't move great distances. A certain plate moves 5mm in 100 days. What is the speed in mm/d? what is it's speed in mm/yr? The speed for it in mm/d is 0.5 mm/d and 18.35 mm/yr. what is a plate? One of te major pieces that make up Earth's upper layer. How do you solve a problem to figure out mm/d. and mm/yr. ? 1. set up the problem- -x-=- 2. choose a conversion factor- 2mm over 1 yr times 1yr. over 365 days = 3.Multiply and solve if you have 2 divide type up 1