Chapter 13 Forces in the Earth Section 1

3 Written Questions

1. Sea-floor spreading and continental drift led to this theory that the earth's surface is made up of large sections that move.
   
   "continental drift + sea-floor spreading=plate tectonics"
2. The layer of the earth that surrounds the core. It is made of liquid and solid rock and it moves.
   
   "The mantle is in the middle."
3. Circular motion of gas or liquid as it heats. In the partly melted upper mantle can push the plates.
   
   "Convection currents on conveyor belt

3 Multiple Choice Questions

1. Dense center of the earth made up of solid iron and nickel surrounded melted iron and nickel.
   
   "the core of an apple"
   1. crust
   2. mantle
   3. core
   4. plate
2. A theory that the ocean floor spreads apart as new crust is being formed that widens the ocean floor and then pushes the continents apart.
   
   "The sea floor IS spreading!'
   1. Sea-floor spreading
   2. Pangaea
   3. plate tectonics
   4. mantle
3. A big landmass that Alfred Wagner thought that the continents separated from millions of years ago.
   
   "Take the Pangaea Puzzle apart."
   1. core
   2. Pangaea
   3. mantle
   4. plate

3 True/False Questions

1. plate → Plates are large sections of earth's crust that move in three different waysP: they move apart, collide, or slide past each other
   
   "Plate tectonics cousins"

   True        False

2. crust → Dense center of the earth made up of solid iron and nickel surrounded melted iron and nickel.
   
   "the core of an apple"

   True        False

3. continental drift → Sea-floor spreading and continental drift led to this theory that the earth's surface is made up of large sections that move.
   
   "continental drift + sea-floor spreading=plate tectonics"

   True        False