Volcanoes

Question 1

What are three types of volcanoes?

Answer 1

Dormant, active, extinct

Question 2

One eg. Of active volcano?

Answer 2

Mount etna, Italy.

Question 3

One eg. Of dormant volcano?

Answer 3

Mount st. Helens

Question 4

Info on mt st. Helens?

Answer 4

Erupted in 1985 after 120 yrs

Question 5

What happens when plates move?

Answer 5

Volcanoes, and fold mountains form and earthquakes occur.

Question 6

How can plates move?

Answer 6

The plates can move together apart or side-by-side.

Question 7

Define destructive plate boundary.

Answer 7

Where two plates collide. have your plate sinks under the lighter plate and goes into the mantle in the mantle the heavier plate melts. Blobs of magma can rise up through the plates to produce volcanoes. As the two plates the edge of the lighter plate crumbles and fold mountains earthquakes also occur at destructive boundaries. (this is a vital topic as it is related to fold mountains, volcanoes, earthquakes, and earth.)

Question 8

The crust of the Earth is broken into what two types of plates?

Answer 8

Continental plate and oceanic plates.

Question 9

What are the three types of plate boundaries?

Answer 9

Constructive destructive, conservative plate boundaries.

Question 10

Define constructive plate boundaries.

Answer 10

Constructive plate boundaries our two plate separate as the plates move apart magma can rise up through a fault or crack in the crust. The magma cools rapidly and adds (constructs) New rock to the crust. Volcanoes/volcanic islands form at constructive plate boundaries.

Question 11

Define conservative plate boundaries

Answer 11

Where plates move side-by-side no crust is formed or destroyed at these boundaries. Earthquakes often occur here to play to Moving side-by-side can get stuck, when they slip forward suddenly this causes an earthquake.

Question 12

Define convection currents.

Answer 12

Convection currents are large currents of hot magma that move in the mantle. Convection currents in the mantle move the earths plates. The earths crust is broken into plates convection currents in the mantle caused the plates move, when the plates move the continents drift.

Question 13

What are the edges of the continental plates and oceanic plates called?

Answer 13

Plate boundaries

Question 14

When did earth form?

Answer 14

Earth formed around 4.54 billion years ago

Question 15

Define plate tectonics

Answer 15

Play tectonics is the idea the earths crust is broken into plates. These plates are moved by confection currents.

Question 16

Who studied plate tectonics?

Answer 16

A German scientist named Alfred Wegener studied this in 1912

Question 17

The continents were all part of a supercontinent called what 200 million years ago?

Answer 17

Pangaea

Question 18

In the 1960s earth scientist discovered what?

Answer 18

Continental drift. Definition= places under the ocean where the plates separated or spread away from each other.

Question 19

By how many years ago did the continents reach their present day locations?

Answer 19

65 million years ago

Question 20

What did Alfred wegener call when the continents reach their present day locations?

Answer 20

Sea floor spreading

Question 21

What are the three cores?

Answer 21

Inner core, outer core, and core

Question 22

What are the three parts of the Earth called?

Answer 22

Crust, mantle and core

Question 23

What is the crust made out of?

Answer 23

Solid rock

Question 24

How thick is the crust under the oceans?

Answer 24

Between 30 and 100 km thick under the oceans.

Question 25

What does the crust float on?

Answer 25

The mantle

Question 26

The crust is broken into pieces called?

Answer 26

Tectonic plates

Question 27

What is under the crust?

Answer 27

Mantle

Question 28

How high can the temperature reach in the mantle?

Answer 28

Up to 4000°C

Question 29

Most of the mantle is solid except for a zone underneath the?

Answer 29

Crust

Question 30

There is semi molten rock called ____

Answer 30

Magma. (Magma moves in currents called convection currents.)

Question 31

What is in the centre of the Earth?

Answer 31

Core

Question 32

What is the core of the Earth made of?

Answer 32

Nickel and iron

Question 33

What is the temperature of the core?

Answer 33

5000°C

Question 34

Decor is divided into two parts what are they called?

Answer 34

Inner core and outer core

Question 35

Is the inner core solid or liquid?

Answer 35

The inner core is solid due to pressure

Question 36

Is the outer core solid or liquid?

Answer 36

The outer core is molten

Question 37

The convection currents go in what motion?

Answer 37

A circular motion

Question 38

What is molten?

Answer 38

Melted rock

Question 39

What is magma?

Answer 39

Semi molten rock

Question 40

What is a mid ocean Ridge?

Answer 40

A ridge of underwater mountains formed where two plates separate and magma solidifies underneath the ocean eg. the mid Atlantic Ridge.

Question 41

What does the word mount etna mean? What language is it translated from? How tall is it? Is it active dormant or extinct?

Answer 41

The word mount etna means I Burn in Greek. it is 3330 meters high it erupts regularly meaning it is active.

Question 42

What is an example of an extinct volcano?

Answer 42

Slemish, County Antrim

Question 43

What does distribution describe?

Answer 43

Distribution describes where something is example distribution of volcanoes mean where volcanoes are

Question 44

Volcanoes occur where?

Answer 44

Volcanoes occur at destructive and constructive plate boundaries (volcanoes form where two plates collide)

Question 45

What is the pacific Ring of fire?

Answer 45

The Pacific Ring of fire is a zone of active volcanoes and earthquake that line around the edge of the Pacific Ocean eg. Mount Fuji.

Question 46

Define extinct.

Answer 46

Has not erupted in historic times.

Question 47

Define dormant.

Answer 47

Has not erupted in awhile

Question 48

Define active

Answer 48

Regularly erupting.