GEAS 49 - 50

Noise pollution is measured in what units?

• Decibels (dB)

• Milligrams (mg)

• Hertz (Hz)

• Centimeters (cm)

Which three of the following are renewable energy sources?

I. biomass

II. natural gas

III. coal

IV. hydropower

V. oil

VI. solar power

• II, IV and VI

• I, II and VI

• II, III and V

• I, IV and VI

When energy extractors find it underground, "natural gas" is a mixture of gases, but it's mostly composed of:

• Ethane

• Butane

• Propane

• Methane

This energy source is the only one that is: renewable, independent of the sun, and has its ultimate source within the earth (in the form of heat in steam and hot water)

• Tidal energy

• Geothermal energy

• Wind power

• Solar energy

All of the following are typically derived from fossil fuels EXCEPT:

• Organic chemicals

• U.S. electrical power

• Plastics

• Geothermal power

Dams that allow water to flow through at a controlled rate can generate electricity if the water turns a turbine on its way out. This kind of power plant produces:

• Kinetic power

• Dam power

• Hydroelectric power

• Geothermal power

Wind energy is a growing energy source. Wind energy is captured by _______ and converted into ________.

• blades; potential energy

• potential energy; kinetic energy

• blades; electrical energy

• kinetic energy; electrical energy

Wafers of layered semiconductor sheets that produce electrical current when exposed to light are technically known as:

• Passive solar cells

• Visible spectrum cell

• Photovoltaic cells

• Thermal cells

Solar thermal systems use solar energy to generate high-temperature heat and electricity. What would be a disadvantage for this type of energy production?

• They can be installed in unusable, arid land areas.

• The energy from the sun is free and abundant

• Net energy yield is low

• 1. Large tax breaks are available for these systems.

A disadvantage that nuclear energy has compared with coal is:

• Air pollution

• Difficulty of plant construction and maintenance

• 1. Contribution to acid rain

• Land disruption due to mining