Quiz on Earth's Internal Heat and Structure

What is the lithosphere?

• The rigid outer layer of the Earth

• The soft layer below the crust

• The inner core of the Earth

• The transition zone between layers

Which layer of the Earth is known as the 'soft layer below'?

• Lithosphere

• Core

• Asthenosphere

• Crust

What is the primary source of radiogenic heat?

• Heat from radioactive decay

• Heat from tidal forces

• Heat from volcanic activity

• Heat from the Sun

What is primordial heat?

• Heat from radioactive elements

• Heat from the Sun

• Heat left over from Earth's formation

• Heat generated by volcanic eruptions

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

• Radiogenic heat

• Tidal heating

• Primordial heat

• Core formation

What process allows the lithosphere to float on the asthenosphere?

• Gravitational pull

• Radiation

• Convection

• Conduction

Which of the following is NOT a type of heat transfer mechanism inside the Earth?

• Evaporation

• Conduction

• Convection

• Radiation

How does convection work in the mantle?

• Heat is transferred by direct contact

• Heat moves through empty space

• Heat travels in liquids or gases

• Heat moves through solid rock

What is the Moho discontinuity?

• The boundary between the mantle and outer core

• The boundary between the crust and upper mantle

• The boundary between the inner and outer core

• The boundary between the lithosphere and asthenosphere

Which of the following is an example of evidence of internal heat?

• Deserts

• Mountains

• Volcanoes

• Rivers