GEO - Chapter 1

Question 1

What are the 4 layers of the earth from the inside out

Answer 1

• inner core
• outer core
• mantle
• crust

Question 2

What state is the Earth’s mantle

Answer 2

solid

Question 3

What is the crust made of

Answer 3

• solid rock
• split into oceanic and continental

Question 4

What state is the outer core

Answer 4

liquid

Question 5

What state is the inner core

Answer 5

solid

Question 6

Continental drift theory:

Answer 6

• Pangaea - supercontinent, broke into smaller continents over millions of years
• continents constantly drifting

Question 7

What are 3 major pieces of evidence to support the Pangaea theory:

Answer 7

1. Continents could fit together
2. Mountain chains and similar rock types line up on different continents
3. Similar plants and animal fossils found line up

Question 8

What are Convergent plate boundaries

Answer 8

Tectonic plates move towards each other

Question 9

What are the location types of convergent plate boundaries

Answer 9

• Oceanic-oceanic
• oceanic-continental
• continental-continental

Question 10

What does Oceanic-oceanic convergance cause

Answer 10

• subduction of one plate, producing oceanic trenches and underwater volcanoes

Question 11

What does Oceanic-continental convergence cause

Answer 11

• subduction of the oceanic crust, causing trenches on oceanic crust and volcanoes on continental crust

Question 12

What is Continental-continental convergence

Answer 12

• crust pushed up to form mountain ranges

Question 13

True or false? Subduction never results in the destruction of the subducting crust.

Answer 13

False - Subduction always results in the destruction of the subducting crust.

Question 14

What are divergent boundaries

Answer 14

Tectonic plates moving apart from one another

Question 15

What are the types of divergent boundaries

Answer 15

• oceanic-oceanic
• continental-contincental

Question 16

What does Oceanic–oceanic divergence cause

Answer 16

• mid-ocean ridge and seafloor spreading

Question 17

What does continental-continental divergence cause

Answer 17

• rift valley and volcanoes

Question 18

True or false: there are 3 types of divergence; oceanic-oceanic, oceanic-continental, and continental-continental.

Answer 18

False - oceanic-continental divergences don’t occur EVER

Question 19

What is a transform boundary

Answer 19

tectonic plates that slide past each other

Question 20

What are caused by a transform boundaries

Answer 20

• Faults, producing earthquakes

Question 21

What are the 3 possible reasons for a tectonic plate to move

Answer 21

• convection currents
• ridge push
• slab pull

Question 22

What are convection currents

Answer 22

• slow circular currents that drag plates horizontally,
• caused by hotter parts of the mantle that rise and then cools, dropping

Question 23

What is a ridge push

Answer 23

• gravity pulls down on mid-ocean ridges
• pushing oceanic plates away from the divergent boundary

Question 24

What is a slab pull

Answer 24

• plate is pulled by the weight of its cold, dense subducting section

Question 25

When is crust formed

Answer 25

• divergent boundaries

Question 26

When is crust destroyed

Answer 26

• convergent boundaries

Question 27

What geographic features are seen when crust is formed

Answer 27

• mid-ocean ridges and rift valleys

Question 28

What geographic features are seen when crust is destroyed

Answer 28

• trenches and mountain ranges