Question

the question is: what is the theory of plate tectonics? multiple - choice questions: 1. according to the theory of plate tectonics, which of the following statements is correct? a. earths outer layer is cool and rigid. b. earths outer layer is divided into large pieces called plates c. earths plates never move d. both a and b are true 2. the author compares the movement of the plates to chunks of ice moving on the top of a frozen river. this comparison is used to: a. help you have a visual image of the way the plates move b. give you the idea that earths surface is very cold c. help you to understand that the lower layers of earth are made of water d. help you understand that plates move only in the winter 3. pangaea was: a. a type of dinosaur b. a layer of the earth c. a large area of land made up of all the continents we have on earth now d. the old name for the continent of asia 4. what did wegener think happened to pangaea? a. pangaea sank to the bottom of the ocean b. pangaea was destroyed by earthquakes c. pangaea was damaged by erosion d. pangaea split up, and the pieces moved apart to become the continents of 5. which discovery(ies) helped scientists understand how plates could move? a. the discovery of earths core b. the discovery that new crust is made in the middle of the oceans c. the discovery that old crust is destroyed in trenches d. both b and c

Explanation:

1. The theory of plate tectonics states that Earth's outer layer is divided into large pieces called plates and the outer - layer is cool and rigid. So, a and b are true.
2. Comparing plate movement to ice chunks on a frozen river helps create a visual image of how plates move.
3. Pangaea was a large landmass made up of all the continents we have now.
4. Wegener thought Pangaea split up and the pieces moved apart to form the current continents.
5. The discovery that new crust is made in the middle of the oceans and old crust is destroyed in trenches helped scientists understand plate movement.

Answer:

1. d. both a and b are true
2. a. Help you have a visual image of the way the plates move
3. b. A large area of land made up of all the continents we have on Earth now
4. d. Pangaea split up, and the pieces moved apart to become the continents of
5. d. Both b and c