The Earth's Internal Heat

What may be possibly formed if there is a radioactive decay of elements in the earth’s mantle?

• a. There may be production of radiogenic heat

• b. Convection current may occur thus producing elements.

• c. Convection current will produce daughter cells and heat loss.

• d. There may be production of accretion and bombarded heat.

Which of the following are the sources of earth’s internal heat?

• a. Heat from the accretion and bombardment of the earth during its early stage.

• b. Heat generated from the radioactive decay.

• c. Both a and b are the correct answer

• d. Only b is the correct answer.

In which particular layer of the earth does the convection current occurs?

• a. Mantle

• b. Crust

• c. Inner core

• d. outer core

What are the elements that participate in the production of radioactive heat on earth?

• a. K40, Th232, U235 and U237

• b. K40, Th231, U235 and U238

• c. K40, Th222, U235 and U238

• d. K40, Th232, U235 and U238

What may likely to happen if there is no production of daughter isotopes of the elements that produce radioactive heat?

• a. The earth would not be able to exist.

• b. The earth may not generate enough heat for living things existence.

• c. The earth would loss all its energy until it becomes a flatten sheet crust.

• d. All of the above.

Which of the following statements is NOT TRUE about the internal heat of the earth?

• a. Earth’s center is about 6,400°C±600°C which means it is where most heat comes from.

• b. The isotopes of potassium can generate heat on for the earth.

• c. Heat loss rate would slow down once the mantle solidified on earth.

• d. Primordial heat and radioactive heat are enough to cool the earth.

Which of the following statements is TRUE about the mantle convection in earth?

• a. Convection occurs at the mantle, but not between the core and mantle

• b. Convection occurs at the mantle, but not between the crust and mantle.

• c. Convection occurs at the mantle and it distributes the heat for lava formation inside the earth.

• d. Convection occurs at the crust and it distributes the heat for lava formation inside the earth

It is a type of heat formed in the early stage of the formation of the earth?

• a. Radiogenic heat

• b. Accretion heat

• c. convection heat

• d. primordial heat

Why is convection current important on earth?

• a. It distributes the heat of the earth evenly in all its layers.

• b. It enhances the production of heat loss.

• c. It creates the magma needed for heat transfer from core to core.

• d. It enables the heat to escape through the atmosphere

Heat from accretion and bombardment of the Earth during the early stages of formation