Practice MCQ Questions and answers on Physics-GK

Land is considered an important resource because it can be used for various purposes like agriculture, forestry, mining, building houses, roads and setting up of industries. It also serves as a habitat for a variety of flora and fauna.

The sun is what makes the water cycle work. The sun provides what almost everything on Earth needs to go—energy, or heat.

Coal is a non renewable source of energy.

Sunlight is the both renewable and inexpensive resource from the given options.

Sources of geothermal power are water and earth's heat.

Pressure is not a form of energy.

Data for 2013 shows that renewable electricity generation overtook natural gas to become the second largest source of electricity worldwide producing 22% of total electricity or 5,130 TWh. Some of the sources of renewable energy are: solar power, wind power, wave and tidal power, geothermal power, biomass and hydro power. Fossil fuels remained the bedrock of global electricity production with more than two-thirds (about 67%) of the total.

Some examples of renewable energy sources are solar energy, wind energy, hydro power, geothermal energy, and biomass energy.

The energy that generates wind comes from solar radiation.

Solar energy is any type of energy generated by the sun. Solar energy is created by nuclear fusion that takes place in the sun. Fusion occurs when protons of hydrogen atoms violently collide in the sun's core and fuse to create a helium atom.