Unit 6 Review - CM

What is a drawback to hydroelectric power?

• fish being isolated on one side of the dam

• water in the reservoir becomes warm

• increases the dissolved oxygen

• increases the rate of nutrient flow downstream

What is a drawback of using ethanol as a fuel alternative to gasoline?

• it is produced from a food item

• produces more pollution than gas

• nonrenewable and comes from the ground

• burns worse than gasoline

Most of the developing countries in the world depend on _______ for their main source of energy.

• renewable sources
• nuclear
• biomass (including wood, manure, etc)
• coal

Which of the following is a drawback to wind energy? (Select all that apply)

• migration of birds being interrupted

• noise

• disrupts the landscape

• not available in all locations

All of the following renewable resources are derived from the sun in some way EXCEPT

• biomass
• wind
• hydroelectric
• geothermal

Why don't we use vegetable oils or other biofuels for our transportation needs

• would require too much land to produce enough to meet demand
• the viscosity isn't appropriate for current engines
• they build up in engines long term and cause problems
• all of these

What is given off as the major waste product in a hydrogen fueled car?

• H₂

• O₂

• H₂O₂

• H₂O

How does biomass reduce our carbon footprint by producing less CO2 than fossil fuels?

• Plants absorb the same amount of CO2 that is released when it is burned.
• Plants remove CO2 from the atmosphere and put it permanently into the ground.
• Biomass filters CO2 to make it more environmentally stable.
• Biomass doesn't release any CO2 when burned.

Which of the following energy sources has the lowest negative environmental impacts?

• Biomass
• Nuclear
• Natural Gas
• Solar

Heating and cooling buildings by exchange with shallow groundwater systems is considered a form of ___ energy.  

• geothermal
• solar
• kinetic
• potential