Evidence of Plate Tectonics

Question 1

Who proposed the continental drift theory?

Answer 1

Alfred Wegener

Question 2

What are his evidences to support his theory - Continental drift theory?

Answer 2

Continents fit like jigsaw puzzle, fossils of the same kind are found on different continent, rock types and paleoclimate data.

Question 3

TRUE OR FALSE

Mesosaurus, cynognathus, lystrosaurus and glossopteris are the fossils found on different continents.

Answer 3

TRUE

Question 4

TRUE OR FALSE
Before we have the 7 continents, it is once became a one big landmass called Pangaea, which means “all the earth” in Greek.

Answer 4

TRUE

Question 5

IDENTIFY

The ocean surrounding Pangaea is called ___________ which means “__________” in Greek.

Answer 5

Panthalassa, “all seas”

Question 6

Where they found the same remains of a mesosaurus that had split up when continents parted?

Answer 6

South America and South Africa

Question 7

TRUE OR FALSE

They discover different fossils on different countries.

Answer 7

FALSE, same fossils

Question 8

Explain the 3rd evidence of Alfred Wegener: Rock and Mountain Correlation/ Geological structures and rock types.

Answer 8

It was discovered that mountains found on different continent have the same rock types. They were formed at the same time and place together but had split up when continents moved.

Question 9

tropical plant remains

Answer 9

bituminous coal

Question 10

Explain what happened to glaciers/glacial striations and sedimentary rocks on the 4th evidence of Alfred Wegener.

Answer 10

Glaciers/glacial striations are found on hot or tropical regions. Sedimentary rocks were found on cold regions.

Question 11

TRUE OR FALSE

Wegener died when he could not give evidence /support for his evidence.

Answer 11

TRUE

Question 12

Tectonics plate are similar to?

Answer 12

Lithosphere plates

Question 13

What is the giant magnet?

Answer 13

Earth

Question 14

What is the reason why the scientific community rejected Alfred Wegener’s theory even though he gave several evidence?

Answer 14

Because they are looking for another evidence that was lacking on Wegener’s theory. That is the mechanism of continental drift or what driving forces made the continents moved.

Question 15

What is the lacking evidence of Alfred Wegener?

Answer 15

Mechanism of continental drift or what driving forces made the continents moved.

Question 16

Area of magma that punch through a single plate.

Answer 16

hotspot

Question 17

TRUE OR FALSE

The lithosphere is broken into plates.

Answer 17

TRUE

Question 18

Because of the hotspot and continuous movement of plates, what is formed?

Answer 18

chain of hotspot volcanic islands

Question 19

What drive plate motion?

Answer 19

Convection currents in the asthenosphere

Question 20

trench : _______

Answer 20

convergent boundaries

Question 21

ocean ridge : _______

Answer 21

divergent boundaries

Question 22

Key figure in changing ideas about the Earth’s surface.

Answer 22

Alfred Wegener

Question 23

Wegener suggested that Pangaea began to breakup about ______________ and the pieces drifted apart to form the present day continents.

Answer 23

200 million years ago

Question 24

What would prove continental drift is true?

Answer 24

1960’s evidence

Question 25

Who proposed the hypothesis of sea-floor spreading?

Answer 25

Harry Hess

Question 26

What mission of Harry Hess he needs to study?

Answer 26

the deepest parts of the ocean floor

Question 27

IDENTIFY | Ocean floor moves like a ____________ carrying continents with it.

Answer 27

conveyor belt

Question 28

IDENTIFY | _____________ is continually added by the process of sea-floor spreading.

Answer 28

New ocean floor

Question 29

Where new ocean floor forms in sea-floor spreading?

Answer 29

along the cracks in the ocean crust

Question 30

Where older rocks are pushed in sea-floor spreading?

Answer 30

sides of the crack

Question 31

What are the evidences for seafloor spreading?

Answer 31

Molten materials, drilling samples and the magnetic reversal

Question 32

What showed that molten material has erupted again and again from cracks along the mid-ocean ridge and cooled quickly?

Answer 32

rock pillows

Question 33

What showed that older rocks are found farther from the ridge and the youngest rocks are in the center of the ridge?

Answer 33

core samples from the ocean

Question 34

Where older rocks are found in seafloor spreading?

Answer 34

far from the ridge

Question 35

Where youngest rocks are found in seafloor spreading?

Answer 35

center of the ridge

Question 36

It would support the continental drift theory.

Answer 36

Mid-ocean ridge

Question 37

Why mid-ocean ridge can support the continental drift theory?

Answer 37

Because during seafloor spreading, sea floor/bed is moving and expanding.

Question 38

What is the reason why there are gaps during seafloor spreading?

Answer 38

Because of the plate movements.

Question 39

Another name for magnetic reversal?

Answer 39

Magnetic flip

Question 40

It happens when the North Pole is transformed into the South Pole and the South Pole becomes the North Pole.

Answer 40

Magnetic reversal

Question 41

Why magnetic reversal is happening?

Answer 41

Because of the changing directions of the flow of materials in the Earth's liquid outer core.

Question 42

What is the name when continents are join once again?

Answer 42

Pangaea Ultima <3

Question 43

Describes one of the earliest way geologist thought continents move over time.

Answer 43

Continental drift

Question 44

IDENTIFY | The plates are always moving and interacting in a process called _________________.

Answer 44

plate tectonics

Question 45

What is the difference between tectonic plates and plate tectonics?

Answer 45

Tectonic plates are the massive slabs of rock. While plate tectonics is the process of plates' movement and interaction.

Question 46

IDENTIFY Some of the most dynamic sites of tectonic activity are _________________ and _______________.

Answer 46

Seafloor spreading zones and giant rift valleys

Question 47

IDENTIFY Most continental and oceanic floor features are the result of geological activity and earthquakes along ___________________.

Answer 47

plate boundaries