What is the name for the layer of loose, unconsolidated material covering the Earth's surface and consisting of mineral and organic particles?

Which layer of the Earth is responsible for the convection currents that drive plate tectonics?

What is the function of red bone marrow in the human body?

What is the term for the point in a planet's orbit where it is closest to the Sun?

Which part of the human ear is responsible for detecting sound vibrations and transmitting them to the brain?

What is the term for the process by which rocks change form or structure due to heat, pressure, or mineral composition changes?

In the human eye, which part is responsible for focusing light onto the retina?

In the human respiratory system, what structure prevents the entry of food into the trachea?

What is the primary function of the skeletal system?

In the water cycle, what is the term for the process by which water vapor is released from the surface of leaves into the atmosphere?