Which of the following powers tropical cyclones?
A) A density-driven circulation that is initiated at the ocean surface by temperature and salinity.
B) An apparent force resulting from Earth's rotation that causes particles in motion to be deflected.
C) Heat transfer in a gas or liquid by the circulation of currents from one region to another.
D) The vast amounts of latent heat as water evaporates and condenses.
Question 2
Which marine ecosystem has the lowest average net primary productivity?
A) Algae beds and coral reefs
B) Estuaries
C) Freshwater swamp and marsh
D) Open Ocean
E) Upwelling zone
The spongy bone in the top of the femur changes density and organization during growth.
Pneumonia patient’s chest x-ray. Note the irregular areas of density.
Population Density versus Economic Growth
Systemic Circulation
Physics - Density and Pressure
Physics - Density, Pressure, and Pascal's Principle