Unit 10 Science 10

Front 1

What are four pieces of evidence of Wegener's continental drift theory?

Back 1

-The continents fit together like puzzle pieces

-There were matching geologic features and rocks on different continents

-There were matching fossils, like mesosaurus, on different continents

-There were evidence of different climates having previously existed (such as glaciers on now warm continents)

Front 2

What was the original supercontinent named?

Back 2

Pangaea

Front 3

What 2 things appear in certain patterns along the edges of tectonic plates?

Back 3

Earthquakes & volcanoes

Front 4

What's Paleomagnetism?

Back 4

It shows that iron based rocks along the ridges are striped with reversing magnetic fields

Front 5

How does spreading of the sea floor work?

Back 5

Magma rises & falls creating convection currents. These convection currents form a spreading ridge where they broke through the earths crust.

Front 6

How many layers does the earth have?

Back 6

four

Front 7

How thick is the earth?

Back 7

Over 1200km

Front 8

Explain the crust of the Earth

Back 8

It's a Outer solid rock layer (granite on land, basalt in oceans)

Front 9

Explain the mantle layer of Earth

Back 9

It's the thickest layer, and mostly solid except for the upper mantle being able to flow like thick toothpaste

Front 10

Explain the Outer core layer of Earth

Back 10

It's composed of liquid iron and nickel

Front 11

Explain the Inner core layer of Earth

Back 11

It is mostly solid iron, at tremendous temperature and pressure.

Front 12

Tectonic plates make up the ____________ which floats on the __________

Back 12

Lithosphere, Asthenosphere

Front 13

Explain the Lithospere

Back 13

It's the crust and upper portion of the upper mantle

Front 14

Explain the astenosphere

Back 14

It's the molten layer of the upper mantle

Front 15

Continents. attached to the tectonic plates, float in the magma of the _____________

Back 15

asthenosphere

Front 16

How do convection currents form

Back 16

Magma is heated in the asthenosphere

Front 17

Where does rising magma reach the surface?

Back 17

Ridges (ocean) and rifts (land)

Front 18

What is ridge push?

Back 18

Magma cools when it reaches the surface, solidifies, and is pushed aside as new magma pushes from below

Front 19

There is how many large tectonic plates

Back 19

12

Front 20

Explain subduction

Back 20

The denser oceanic plate subduct's under the lighter continental plate

Front 21

Where are large earthquakes and volcanoes found

Back 21

subduction zones

Front 22

Which plate boundary do plates spread apart?

Back 22

Divergent

Front 23

Which plate boundary is the area where plates meet?

Back 23

Convergent

Front 24

Which plate boundary is when the plates slide past eachother

Back 24

transform

Front 25

What does ocean-oceanic produce

Back 25

volcanic island arcs

Front 26

What does continental-continental make

Back 26

mountain ranges

Front 27

What does transform form

Back 27

Earthquakes

Front 28

How do earthquakes often form

Back 28

The friction from moving tectonic plates, there pressure builds up

Front 29

Whats the epicentre

Back 29

Point on the surface directly above the focus

Front 30

Which wave is first, second, last

Back 30

p,s,l

Front 31

Which wave cant go through liquids

Back 31

s

Front 32

Which volcano is a tall cone, and has unfrequent, violent eruptions?

Back 32

Composite volcanoes

Front 33

Which volcano is a low, wide cone and forms over hot spots?

Back 33

Shield

Front 34

Which volcano is not explosive but has massive amounts of lava?

Back 34

Rift eruptions

Front 35

What is used to describe the magnitude of an earthquake

Back 35

richter