Crust + Drifting Contents + Moving Earth Flashcards

studying

1
Q

What is a fossils

A

preserved remains from an living organism

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2
Q

person that finds fossils is called

A

Palaeontologist

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3
Q

Amber fossils are

A

full body INSECTS preserved in tree sap + can be preserved for millions of yrs

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4
Q

Carbonation fossils are

A

dissolved organism except the carbon which leaves a residue showing an outline of the organism

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5
Q

Freezing fossils are

A

preserved by ice for thousands yrs if it doesn’t melt

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6
Q

Body fossils are a

A

portion of the actual organism remain E.g tooth, bone

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7
Q

Trace fossils are

A

on organism’s but ‘‘traces’’ in the rocks.

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8
Q

Types of trace fossils

A

Cast & mold, animal trace, & impression.

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9
Q

what rock are fossils found

A

Sedimentary rock

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10
Q

what type of Sedimentary

A

shale, limestone, sandstone rock

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11
Q

Fake fossils that looks like fossils are called

A

Pseudo fossils

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12
Q

how thick is the crust

A

6km - 40km

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13
Q

what minerals are the crust made up of

A

rock, sand, soil

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14
Q

how thick is the mantle

A

around 2900km

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15
Q

how hot and how fast does the mantle move

A

semi-molten + moves very slowly

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16
Q

how thick is the outer core

A

2000km

17
Q

what is the molten liquid made up of in the outer core

A

iron and nickel

18
Q

how hot in the molten liquid in the outer core

A

5000 degrees temp

19
Q

what’s the radius of the inner core

A

1100km

20
Q

is the inner core solid or liquid

A

solid

21
Q

What was the name of the scientist that argued that the continents were once together

A

Alfred Wegener

22
Q

When did Alfred Wegener argue that the continents were together

A

1912

23
Q

how many yrs ago did the continents start to break

A

250 million yrs

24
Q

When did Alfred’s theory confirmed to be true

A

1960s

25
Q

What was 1 of Alfred’s evidence for the theory.

A

Garden snails lived on the west coast of North America + East France

26
Q

Pangaea means

A

All Earth

27
Q

How thick is the plates

A

100km

28
Q

What layer of the Earth does the plates go up to

A

MANTLE

29
Q

Why do the plates move?

A

The mantle is lava and the lava moves the plates as it moves

30
Q

What happens when plate hit each other

A

Mountain

31
Q

Plates move apart = to

A

volcano