The Blue Color of the Sky Is a Result of ____

question 19

Multiple Choice

The blue color of the sky is a result of ____.

• A)selective scattering of visible light by air molecules
• B)the filtering effect of water vapor in Earth's atmosphere
• C)reflection of sunlight off Earth's oceans
• D)transmission of visible light through the ozone layer in Earth's stratosphere
• E)absorption of short wavelengths by air molecules

---

Definitions:

Photosynthesis

The process by which green plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy in the form of glucose, using water and carbon dioxide and releasing oxygen as a byproduct.

Biomass

A quantitative estimate of the total mass, or amount, of living material in a particular ecosystem.

Gross Primary Productivity

The total rate at which photosynthetic organisms in an ecosystem convert carbon dioxide into organic carbon compounds.

Net Primary Productivity

The rate at which plants and other photosynthetic organisms produce organic compounds in an ecosystem minus the rate at which they use some of these compounds through respiration.