Renewable Energy

The energy we use to function in our everyday lives can be classified as...

• Renewable or non-renewable

• Natural or non-renewable

• Renewable and Natural

• All of them

Answer explanation

Heating and cooling our homes, lighting office buildings, driving cars and moving freight, and manufacturing the products we rely on in our daily lives are all functions that require energy.

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Why is solar energy considered renewable energy?

• It's cheaper than fossil fuels

• The sun's energy would not run out for billions of years

• Solar energy recharges batteries

• All of them

Answer explanation

Solar energy is that produced by the Sun's light – photovoltaic energy – and its warmth – solar thermal – for the generation of electricity or the production of heat. Inexhaustible and renewable, since it comes from the Sun, solar energy is harnessed using panels and mirrors.

Renewable energy resources produce less_____________ than fossil fuels.

• pollution

• energy

• wind

• light

Answer explanation

Fossil fuels, when burned to produce energy, cause harmful greenhouse gas emissions, such as carbon dioxide. Generating renewable energy creates far lower emissions than burning fossil fuels.

_____________ power is electricity produced by flowing water.

• Solar

• Wind 

• Hydroelectric 

• water

Answer explanation

Hydropower, or hydroelectric power, is a renewable source of energy that generates power by using a dam or diversion structure to alter the natural flow of a river or other body of water.

Wind Energy is...

•  The energy that comes from harnessing the movement of the air

• The energy that comes from the Sun

• Fuel from plant material

• A source of renewable energy, such as solar, wind, or geothermal energy

Answer explanation

Wind power or wind energy describes the process by which the wind is used to generate mechanical power or electricity. Wind turbines convert the kinetic energy in the wind into mechanical power.

What is global warming?

• 1 increase in the average temperature of the Indian Ocean

• 2 decrease in the average temperature of the Earth's atmosphere

• 3 increase in the average temperature of the Earth's atmosphere and its oceans

• 4 decrease of CO2 in environment

Answer explanation

“Global warming” refers to the rise in global temperatures due mainly to the increasing concentrations of greenhouse gases in the atmosphere. “Climate change” refers to the increasing changes in the measures of climate over a long period of time – including precipitation, temperature, and wind patterns.

Which gas is responsible for global warming?

• Carbon monoxide

• Carbon dioxide

• Nitrous oxide

• Sulfur dioxide

Answer explanation

Renewable energy sources do not emit greenhouse gases, the world's top culprit for global warming. As the green energy sector grows, not only does it create a positive impact on the environment, but it generates more jobs. In fact, it generates between 3 — 5 times more jobs than non-renewable sectors.

The house illustrated here uses panels on the roof to collect a natural resource and convert it into electricity that can be used. Which alternative energy source does this house use?

• Water

• Wind

• solar

• Geothermal

Heat transferred from beneath the surface of Earth and used to produce energy for human use is...

• Hydropower

• Wind Energy

• Geothermal Energy

• Solar Energy

Answer explanation

Geothermal energy is the heat produced deep in the Earth's core. Geothermal energy is a clean, renewable resource that can be harnessed for use as heat and electricity. Geothermal energy is heat that is generated within the Earth.

All of the following are considered renewable energy sources EXCEPT –

• Wind

• Coal

• Solar

• Biomass

Answer explanation

Coal is an organically derived material. It is formed from the remains of decayed plant material compacted into a solid through millions of years of chemical changes under pressure and heat. Its rich carbon content gives coal most of its energy content.