Earth Science: Internal Heat Sources

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

The heat ____ from the crust down to the inner core due to several reasons.

Equals
Increases (correct)
Decreases
Proportional

Which among the layers of the Earth has the highest temperature?

The core which has decaying isotopes (correct)
The mantle which is the mostly solid bulk layer of the Earth
The lithosphere which is the solid part of the Earth
The crust which is the most exposed to ultraviolet rays

Which layer of the Earth has the highest amount of molten state iron?

The lithosphere which is known as the solid outermost part of the Earth
The core which is the hot and dense inner most layer of the Earth (correct)
The mantle which is the most massive layer of the Earth
The crust which is the lightest and thinnest layer of the Earth

Why is the Earth considered to be a thermal engine?

Decay of isotopes contributes to the internal heat of the Earth (A) Signup and view all the answers

What happens to the amount of heat from the outermost layer of the Earth down to its core?

As you move from the surface of the Earth to the inner core, the amount of heat becomes higher (C) Signup and view all the answers

Which of the following pertains to the process by which gasses and dust of cloud were attracted by gravitational energy 4.6 billion years ago?

Accretion (C) Signup and view all the answers

Direct observation is not possible to know all the details about the interior of the Earth due to its changing nature of internal composition and tremendous heat that come from its inner most layer.

True (A) Signup and view all the answers

Which among the layers of the Earth has the greatest pressure which contributes to the production of the tremendous internal heat?

Inner core has the greatest pressure among the layers of the Earth (A) Signup and view all the answers

Which of the following is NOT a major process that contributed to Earth's internal heat?

When iron is crystallized, heat is released causing the inner core to be the hottest layer (D) Signup and view all the answers

How did the Earth generate heat on its early stage of formation?

Due to gravitational pressure at the center of the planet (D) Signup and view all the answers

What process exists as heat is transferred from one plate to another along plate boundaries?

Convection (B) Signup and view all the answers

How do radioactive isotopes emit heat energy and contribute to Earth's internal heat?

Due to spontaneous radioactive decay of isotopes (B) Signup and view all the answers

How do naturally occurring isotopes play a vital role in the production of Earth's internal heat?

Due to its abundance and emission of heat when it decays (D) Signup and view all the answers

What happened to the pressure inside the Earth as you go deeper?

The pressure increases as you descend to the interior of the Earth (A) Signup and view all the answers

Why does Earth's internal heat builds up due to gravitational pressure?

The amount of heat that can be generated in the Earth's interior is tremendous while lesser amount can escape on the surface (C) Signup and view all the answers

Which of the following sentences about the internal heat of the Earth is INCORRECT?

As someone goes down the center of the Earth, the density of the materials increases, thus, the temperature increases (C) Signup and view all the answers

The heat that flows from the inner most layer makes materials move in the different layers of the Earth. Which of the following best describe the given sentence?

The given statement conveys correct information (D) Signup and view all the answers

Which of the following is the main source of Earth's internal heat?

Decay of radioactive elements in the core of the Earth (B) Signup and view all the answers

Flashcards

Earth's internal heat sources

The various processes that generate heat within Earth's interior.

Primordial heat

Heat left over from Earth's formation.