Question 1

Which of the following electricity energy sources is LEAST expensive for the consumer?

Accepted Answer

Fossil fuels, such as coal and natural gas, are currently the least expensive sources of electricity for consumers. Solar and wind energy have become more competitive in recent years, but their upfront costs for installation and production are still higher than traditional fossil fuel sources. Geothermal energy and nuclear energy also require significant upfront investment and have high operating costs, making them less cost-effective for consumers.

Question 2

Refer to Infographic 7.What does "payback time" mean in terms of conservation of energy?

Accepted Answer

"Payback time" in terms of conservation of energy refers to how long it takes for the savings from using a new technology to equal the original cost of the technology.

Question 3

The people of Samsø discovered the best way to achieve energy independence is to____??________.

Accepted Answer

Conserving energy is the best way to achieve energy independence because it reduces the amount of energy that is needed from external sources.

Question 4

What is the "take-home message" Samsø is sending to other communities?

Accepted Answer

The answer of What is the "take-home message" Samsø is...

Question 5

According to energy advisors,what produces the "greenest" kilowatt of electricity?

Accepted Answer

An "unused" kilowatt, or energy that is saved through efficiency and not used at all, is considered the "greenest" because it requires no production, thus having the least environmental impact.

Question 6

For the residents of Samsø,one of the first conservation efforts revolved around ___________.

Accepted Answer

One of the first conservation efforts for Samsø residents was focused on heating homes. The island community invested in decentralized heating systems using straw, wood chips, and solar thermal energy. This led to a drastic reduction in carbon emissions and reliance on imported fossil fuels for heating.

Question 7

Refer to Infographic 7.Why are renewable forms of energy so expensive when compared with fossil fuels? What are two cheaper ways to sustainably meet energy needs without such a huge financial input?

Accepted Answer

The answer of Refer to Infographic 7.Why are renewable forms...

Question 8

Turning off lights when you leave a room or switching to CFL or LED lighting is an effective conservation method because lighting usually accounts for ___________ of average home electrical costs.

Accepted Answer

Lighting typically accounts for about 25% of average home electrical costs, making energy-efficient practices and products like CFL or LED bulbs effective for conservation and cost savings.

Question 9

In terms of true cost,which of the following electricity energy sources is LEAST expensive for the consumer?

Accepted Answer

Wind energy is often the least expensive for consumers due to low operational and maintenance costs, and the absence of fuel costs.

Question 10

What do energy advisors mean by the phrase "the greenest kilowatt is the one you never use"?

Accepted Answer

The answer of What do energy advisors mean by the...

Question 11

Which of the following is NOT a no-cost way to conserve energy?

Accepted Answer

Insulating hot water pipes may require purchasing materials or hiring a professional, therefore it is not a no-cost way to conserve energy. The other options listed do not require any additional expenses. A and B, washing clothes in cold water and taking shorter showers, both use less energy than using hot water or taking longer showers, respectively. C, closing the fireplace damper when it is not in use, prevents warm air from escaping up the chimney. E, lowering the thermostat, reduces the amount of energy needed to heat a space.

Question 12

Switching from incandescent bulbs to compact fluorescents (CFL)provides a twofold benefit during the summer.Why?

Accepted Answer

CFL bulbs are more energy-efficient than incandescent bulbs, meaning they use less electricity to produce the same amount of light. Additionally, incandescent bulbs convert a larger portion of their energy into heat rather than light, contributing to higher temperatures in a room, which is particularly undesirable during summer.

Question 13

Which step costs money but has a quick payback time?

Accepted Answer

Replacing old light bulbs with energy-efficient LED bulbs costs money initially but has a quick payback time due to the energy-saving benefits. LED bulbs use significantly less energy and last longer than traditional incandescent bulbs, resulting in lower electricity bills over time.

Question 14

What alternative energy resources did Samsø choose to use in order to become a green community?

Accepted Answer

According to the article, Samsø chose to use wind turbines, solar panels, and biomass as their primary alternative energy resources. Geothermal energy was not mentioned, and hydro energy was only briefly mentioned as a potential future resource. Therefore, option B is the best choice.

Question 15

Currently,fossil fuels meet most of the energy needs of the United States.Why do experts say that in the future,no one renewable source will dominate as fossil fuels do today?

Accepted Answer

The answer of Currently,fossil fuels meet most of the energy...

Question 16

What are the advantages and disadvantages to using straw to heat homes versus other more conventional heating fuels?

Accepted Answer

The answer of What are the advantages and disadvantages to...

Question 17

How does insulating pipes,using an on-demand water heater,and taking shorter showers save energy?

Accepted Answer

The answer of How does insulating pipes,using an on-demand water...

Question 18

What is needed in order for a community like Samsø to switch to a greener lifestyle?

Accepted Answer

The answer of What is needed in order for a...

Question 19

What costs should be considered when comparing renewable energy technologies?

Accepted Answer

When comparing renewable energy technologies, it is important to consider their social, environmental, and economic costs. Social costs include the potential impacts on local communities and public health, while environmental costs include the potential impacts on ecosystems and biodiversity. Economic costs include the initial investment required, ongoing maintenance costs, and the cost of electricity generated. Therefore, the best choice is to consider all of these costs when comparing renewable energy technologies.

Question 20

One of the main reasons Samsø was able to convert fully to renewable energy sources is because of ______________.

Accepted Answer

Citizen investors played a significant role in the conversion of Samsø to renewable energy sources by financing multiple projects on the island through cooperative ownership models.

Quiz 31: Sun, Wind, Water, and Earth Energy Fueled by the Sun