Earth and Life Science

What is the primary source of the Earth's internal heat?

• Solar radiation

• Primordial heat

• Ocean currents

• Atmospheric pressure

What is accretional energy?

• Energy from radioactive decay

• Energy from the collision and accumulation of planetesimals

• Energy from solar radiation

• Energy from volcanic eruptions

What process results in the production of differentiation energy?

• Radioactive decay

• Solar radiation

• Separation of Earth into different layers

• Ocean currents

Which of the following is a result of radioactive decay?

• Formation of the Earth's crust

• Release of energy that is converted to heat

• Movement of tectonic plates

• Formation of ocean currents

Which isotopes contribute largely to the Earth's internal heat through radioactive decay?

• Carbon, Nitrogen, and Oxygen

• Hydrogen, Helium, and Lithium

• Uranium, Thorium, and Potassium

• Iron, Nickel, and Cobalt

What is magma primarily composed of?

• Water and minerals

• Silica

• Carbon dioxide

• Nitrogen

Which type of magma has the highest silica content?

• Mafic magma

• Intermediate magma

• Felsic magma

• Ultramafic magma

What is the process called when the mantle rock melts due to a decrease in pressure at high temperature?

• Heat Transfer

• Decompression Melting

• Flux Melting

• Subduction

Where does Heat Transfer commonly occur?

• Mid-ocean ridges

• Continental rift valleys and hot spots

• Subduction zones

• Ocean trenches

What disrupts the bond between the minerals of the mantle rock in Flux Melting?

• Increase in pressure

• Decrease in temperature

• Addition of volatile compounds like water and carbon dioxide

• Movement of tectonic plates