Earth Science 8th Grade Flashcards Preview

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Flashcards in Earth Science 8th Grade Deck (23)
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1
Q

Transition zone is between upper and lower mantle? True or false

A

True

2
Q

Scientists have dug unto the center of the earth? True or false

A

False they never have because it’s too hot

3
Q

Boron is an all layers of the mantle and contributes to magnetic field. True or false

A

False Iron is in outer core and contributes to magnetic fileds

4
Q

Moho is a type of rock I’m inner core. True or false

A

False it seperate the mantle and crust

5
Q

Thin hard layer of earth?

A

Crust

6
Q

Central portion

A

Core

7
Q

Crust on continents

A

Continental crust

8
Q

Fastest seismic waves

A

P

9
Q

Layer between mantle and crust

A

Moho

10
Q

2nd fastest seismic waves

A

S

11
Q

Outermost rigid layer

A

Lithosphere

12
Q

Layer that’s like putty

A

Asthenosphere

13
Q

Crust has variety of features like….

A

Oceans mountains and valley

14
Q

Why does the earth have magnetic fields

A

Outer core has convection currents that flow through molten irons and other metals causing electric currents forming magnetic fields

15
Q

Crust is solid, mantle is ____ solid, outer core is

I quid, inner core is ______

A

Molten solid, solid

16
Q

What part of the earth can be 0°c

A

Crust

17
Q

Inner core is as hot as _____

A

Sun

18
Q

Thickest layer is _____

A

Core

19
Q

Thinnest layer is ____

A

Crust

20
Q

Layer with most volume is _____

A

Mantle

21
Q

Essay- what would you experience if you were to travel to center of earth

A

Rocks at first, then increasing pressure and heat, and even one layer of liquid

22
Q

Essay 2- how does God sustain crust so we can live on it?

A

He made shelter, land, water, food, etc

23
Q

S waves travel through Atlantic and p waves travel through pacific ? True or false

A

False, p waves travel through solids, liquids, gases and S waves only travel through liquids. They are both seismic