Earth Science: Internal Heat Sources

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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 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 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 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 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 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 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 Signup and view all the answers

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

Convection 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 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 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 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 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 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 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 Signup and view all the answers

Study Notes

Earth's Internal Heat Sources

Earth's internal heat is vital for its diverse organisms and natural phenomena
This heat comes from various sources, including primordial heat and radioactive decay
Primordial heat remains from Earth's formation from accretion, where gravitational energy attracted gases and dust, creating heat
Radioactive decay of isotopes, like potassium-40, uranium-235, -238, and thorium-232, releases energy in the form of heat
Gravitational pressure in the Earth's core due to density increases temperature
Dense core materials, primarily iron and nickel, contribute to Earth's intense internal heat.

Module Information

This module is about Earth Science for STEM students
It focuses on Earth's internal heat sources
Students should identify those sources
Students should also understand how internal heat is produced
There are various activities and questions provided within the modules to help learners understand the topics.

Assessment Information

There are multiple-choice questions evaluating learners' understanding of Earth's internal heat sources
The questions relate to temperature, density, elements in the Earth's core and the processes generating internal heat.
Includes questions on how humans harness Earth's internal heat sources for electricity production.

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Description

Explore the vital internal heat sources of Earth in this quiz designed for STEM students. Learn about primordial heat, radioactive decay, and the role of gravitational pressure in generating heat. Engage with various activities to deepen your understanding of how internal heat is produced and its significance for Earth's organisms and phenomena.