Seafloor Spreading

Answer:

This theory states that mid-ocean ridges are formed by currents of magma rising up from the mantle; volcanic eruptions create new basaltic ocean floor that then spreads laterally from the ridge.

Paleomagnetic

Answer:

The study of the record of the Earth's magnetic field in rocks.

Ocean Floor Cores

Answer:

Rock sediments from the ocean floor.

Divergent

Answer:

Magma from asthenosphere wells up in the opening between plates.

Acid Deposition

Answer:

Sulfur oxides and nitrogen oxides, emitted by burning fossil fuels, enter the atmosphere - where they combine with oxygen and water to form sulfuric acid and nitric acid - and return to Earth's Surface. (p. 452)

Acid Precipitation

Answer:

Conversion of sulfur oxides and nitrogen oxides to acids that return to Earth as rain, snow, or fog. (p. 452)

Active Solar Energy Systems

Answer:

Solar energy systems that collect energy through the use of mechanical devices like photovoltaic cells or flat-plate collectors. (p. 463)

Animate Power

Answer:

Power supplied by people or animals. (p. 441)

Biochemical Oxygen Demand (BOD)

Answer:

Amount of oxygen required by aquatic bacteria to decompose a given load of organic waste; a measure of water pollution. (p. 456)

Breeder Reactor

Answer:

A nuclear power plant that creates its own fuel from plutonium. (p. 460)