Earth and Its Structure

1

The deepest layer of the Earth is the:

A Inner core B Outer core C Mantle D Crust

2

What causes the movement of tectonic plates?

A Convection currents in the mantle B Earth's rotation C Wind erosion D Ocean currents

3

Which of the following is not a layer of the Earth?

A Hydrosphere B Crust C Mantle D Core

4

Which layer of the Earth is the thickest?

A Mantle B Crust C Inner core D Outer core

5

The process of plates moving apart is called:

A Divergence B Convergence C Transform movement D Subduction

6

The solid outer layer of the Earth is composed of:

A Rocks and minerals B Iron and nickel C Water and ice D Gases

7

The layer of the Earth that contains the tectonic plates is the:

A Lithosphere B Asthenosphere C Mesosphere D Hydrosphere

8

The Earth's crust is thinnest under:

A Oceans B Mountains C Plains D Deserts

9

The Earth's rotation and revolution are caused by:

A Gravitational forces B Magnetic forces C Nuclear forces D Electrical forces

10

The theory that explains the movement of the Earth's plates is called:

A Plate tectonics B Continental drift C Sea-floor spreading D Subduction

11

The semi-fluid layer of the mantle on which tectonic plates move is called the:

A Asthenosphere B Lithosphere C Mesosphere D Core

12

The inner core of the Earth is:

A Solid B Liquid C Gaseous D Plasma

13

Which layer has the lowest density?

A Crust B Mantle C Outer core D Inner core

14

The outermost solid rock layer of the Earth is the:

A Crust B Mantle C Core D Lithosphere

15

The Earth's core is primarily made up of:

A Iron and nickel B Silicon and aluminum C Magnesium and calcium D Oxygen and carbon

16

The temperature of the mantle ranges from:

A 500-900°C to 4000°C B 100-300°C to 1000°C C 4000-5000°C to 6000°C D 0-100°C to 500°C

17

The outer core is responsible for generating the Earth's:

A Magnetic field B Gravitational field C Electric field D Thermal field

18

The highest mountain on Earth, Mount Everest, is part of which layer?

A Crust B Mantle C Core D Lithosphere

19

The Earth is approximately how old?

A 4.5 billion years B 4.5 million years C 45 billion years D 450 million years

20

The outermost layer of the Earth is broken into pieces called:

A Tectonic plates B Continents C Islands D Mountains

21

Which of the following is found in the Earth's core?

A Nickel B Aluminum C Silicon D Sodium

22

Which of the following is a characteristic of the inner core?

A Extremely high pressure B Low temperature C Liquid state D Made of silicon

23

The layer of the Earth that is liquid is the:

A Outer core B Inner core C Mantle D Crust

24

Which layer of the Earth is solid and made of rock?

A Crust B Outer core C Inner core D Mantle

25

Which type of rock is formed by heat and pressure deep within the Earth?

A Metamorphic B Igneous C Sedimentary D Volcanic