Earth

Question 1

What are the layers of Earth?

Answer 1

It is;
1. Crust
2. Mantle
3. Outer Core
4. Inner Core

Question 2

What is a Lithosphere?

Answer 2

The lithosphere is the outer shell of a terrestrial (refers to things related to land or the planet of earth) planet or natural satellite (astronomical body that orbits a planet).

Question 3

Where is the Earth’s Lithosphere?

Answer 3

The Earth’s lithosphere is the crust and the upper mantle.

Question 4

What is the Asthenosphere and where is it located?

Answer 4

The Asthenosphere is the weaker part of the upper mantle.

The Asthenosphere is located under the lithosphere.

Question 5

What layer of the Earth is liquid?

Answer 5

The outer core, it was confirmed when the seismograph was unable to record the seismic waves because it cannot pass through the outer core.

Question 6

What is the inner core made up of?

Answer 6

Solid Iron-nickel Alloys

Question 7

What is the mantle made up of?

Answer 7

Semi-molten rocks called magma

Question 8

What is the crust made up of?

Answer 8

Solid rocks and minerals

Question 9

What is the most dense layer of Earth?

Answer 9

The most dense layer of Earth is the Inner core, because it is in the deepest part of the Earth, and the denser the object is, the lower it sinks. Because the more dense and object is, the more mass it has.

Question 10

Why is the inner core solid?

Answer 10

Because of Pressure Freezing. It is when things go solid not because of decrease in temperature but because of extreme pressure.

Question 11

What is Pressure Freezing?

Answer 11

When things go solid not because of decrease in temperature but because of extreme pressure.

Question 12

Why is the Outer Core Liquid?

Answer 12

Because there is not enough pressure to keep it in solid state.

Question 13

What is radioactivity?

Answer 13

The act of radiating radiation spontaneously

Question 14

What is radiation?

Answer 14

Energy that comes from a source and travels through space at the speed of light.

Question 15

Where does radioactivity occur?

Answer 15

The inner core.

Question 16

What does the radioactivity in the Earth’s core cause?

Answer 16

Convection currents that occur in the mantle

Question 17

What are Convection Currents?

Answer 17

Natural process of heat transfer involving the movement of energy and heat from one place to another.

Question 18

The boundaries of the Earth’s layers are;

Answer 18

1. Conorod Discontinuity
2. Mohorovicic Discontinuity
3. Repetti Discontinuity / Transition Zone
4. Guttenberg Discontinuity
   5.Lehman Discontinuity

Question 19

Boundary between upper crust and lower Crust?

Answer 19

Conrad Discontinuity

Question 20

Boundary between lower Crust and upper mantle?

Answer 20

Mohorovicic Discontinuity

Question 21

Boundary between upper mantle and lower mantle?

Answer 21

Transition zone or Repitti Zone

Question 22

Boundary between lower mantle and upper outer core?

Answer 22

Guttenberg Discontinuity

Question 23

Boundary between outer core and inner core?

Answer 23

Lehman Discontinuity

Question 24

Tectonic Plates

Answer 24

The sections that the lithosphere is divided Into.

Question 25

Plates

Answer 25

The surface of the earth that is broken into large plates.

Question 26

Difference between tectonic plates and plate tectonics?

Answer 26

Tectonic plates are different pieces of the earth’s crust that move around as thy float on top of the mantle, while plate tectonics is how this pieces move and interact with each other.

Question 27

Plate Tectonics

Answer 27

How plates move and interact with each other.

Question 28

2 types of crust

Answer 28

1. Continental Crust
2. Oceanic Crust

Question 29

Continental Crust

Answer 29

Found under land masses

Question 30

Oceanic Crust

Answer 30

Found under ocean floor

Question 31

The 2 Layers of Crust

Answer 31

Upper Crust and Lower Crust

Question 32

Upper Crust

Answer 32

Composed of Granite, only present in Continental Crust.

Question 33

Lower Crust

Answer 33

Composed of Basalt, present in both crusts

Question 34

How do we know that the outer core and inner core are composed of iron and nickel Alloy?

Answer 34

1. The earth have a magnetic field due to the iron and nickel Alloy.
2. The overall density of the earth is higher than the overall density of rocks in the crust, which suggest that the inside must be made up of something denser than rocks.
3. Based on the analysis of meteorites.