Earth's Internal Heat

What happens to the temperature as you move from the surface of Earth to its inner most layer?

• The temperature decreases as the amount of heat increases.

• The temperature fluctuates from the crust done to the core.

• The temperature increases from the crust down to the core.

• The temperature stays the same in all the layers.

As you move from the surface of Earth to the inner core, what happens to the density of the materials of each layer?

• Density of materials may increase but will decrease from time to time.

• Density of materials decreases due to its composition.

• Density of materials remains the same in all the layers.

• Density of the materials increases from the crust to the core.

What prevents the iron and other minimal amount of some elements in the core from melting?

•  Density

• Pressure

• Temperature

• Vapor

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

• Due to chemical stability

• Due to its abundance and emission of heat when it decays.

• Due to its high energy capacity

• Due to the heat it releases as it is subjected to low temperature.

Heat flows from the different layers to the earth. What type of heat transport occurs between the mantle and the core?

• Conduction

• Convection   

• Radiation    

• Sublimation

Which of the following is an isotope that is present in the core of the earth which contributes to immense heat in its interior?

• Uranium – 235

• Uranium – 253

• Uranium – 523

• Uranium – 325

Which of the following terms pertains to the spontaneous breakdown of an atomic nucleus which results to the release of energy and matter from the nucleus?

• Convection

• Gravitational pressure

• Radiation

• Radioactive decay

What happens to the amount of pressure as you move from the outermost layer of Earth to its inner most layer?

• The amount of pressure increases from the crust down to the core.

• The amount of pressure decreases from the outermost layer to the innermost layer.

• The amount of pressure remains the same.

• The pressure will increase then decrease from each layer.

Why do you think Earth is considered as a thermal engine?

• As a natural satellite the moon gives thermal energy to earth.

• Decay of isotopes contributes to the internal heat of the earth.

• The energy coming from the sun gives heat tremendous heat on the surface.

• Too much pressure on the crust causes materials to be molted which gives large amount of heat.

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

• Because the escape of heat from Earth’s surface is greater than the heat generated.

• Heat cannot escape from the interior of the earth since it is a closed system.

• The amount of heat that can be generated on the earth’s interior is tremendous while lesser amount can escape on the surface.

• The amount of heat that can be released on the surface is greater.