earth's interior

Question 1

when was a theory developed about earth’s landmasses and by who?

Answer 1

1912 / Alfred Wegner

Question 2

what was the land formations millions of years ago?

Answer 2

attached together in one continental form

Question 3

what was the continental form called?

Answer 3

Pangaea

Question 4

what is the continental drift theory?

Answer 4

over time, the landmasses drifted apart to form the present day shape and location of the continents

Question 5

what causes convection currents?

Answer 5

uneven temperatures in the earth

Question 6

heat from the core is brought to the ________ via _________

Answer 6

asthenosphere / conduction

Question 7

what happens to the heat after it is brought to the asthenosphere?

Answer 7

it enters a cycle of convection to heat the upper mantle

Question 8

what does the cycle of heat provide?

Answer 8

energy to move the plates

Question 9

what are the three types of plate movement?

Answer 9

divergent / convergent / transform

Question 10

what is divergent movement?

Answer 10

two plates move apart from each other

Question 11

what is convergent movement?

Answer 11

the plates push against each other

Question 12

what is transform movement?

Answer 12

two plates slide past each other

Question 13

what is the thickness of earth’s crust?

Answer 13

8-64 km

Question 14

what is the feeling of earth’s crust?

Answer 14

cold / fragile

Question 15

what is the earth’s crust made of?

Answer 15

granite / basal

Question 16

what is earth’s outer core’s temperature?

Answer 16

3000-4000 degrees Celsius

Question 17

what is the thickness of earth’s outer core?

Answer 17

2000 km

Question 18

what is earth’s outer core made of?

Answer 18

liquid nickel / liquid iron

Question 19

what is the thickness of earth’s mantle?

Answer 19

1800 km

Question 20

what is the feeling of earth’s mantle?

Answer 20

hot / molten

Question 21

what is earth’s mantle made of?

Answer 21

magnesium / silicon

Question 22

what is earth’s inner core’s temperature?

Answer 22

5000-6000 degrees Celsius

Question 23

what is the thickness of earth’s inner core?

Answer 23

1400 km

Question 24

what is earth’s inner core made of?

Answer 24

solid nickel / solid iron

Question 25

what are the 8 layers of earth, from the inside out

Answer 25

``` solid iron core liquid iron core lower mantle upper mantle asthenosphere lithosphere oceanic crust continental crust ```

Question 26

what does Pangaea mean in greek?

Answer 26

all earth

Question 27

what is Pangaea Ultima?

Answer 27

a possible future continent configuration