Explanation

• Coal, fossil fuels, crude oil, natural gas, etc are all hydrocarbon fuels.
• These are called as non-renewable source of energy because they take millions of years to regenerate themselves.
• Water energy is renewable because it is regenerated by water cycle.
• Also wind energy and solar energy are renewable sources of energy.

Explanation

Renewable energy is energy derived from natural sources that are replenished at a higher rate than they are consumed. Sunlight and wind, for example, are such sources that are constantly being replenished.

Explanation

Explanation

A covalent bond is the force of attraction that holds together two atoms that share a pair of valence electrons. The shared electrons are attracted to the nuclei of both atoms. This forms a molecule consisting of two or more atoms.

Explanation

The term "AI" could be attributed to John McCarthy 

Explanation

The Earth rotates on its axis from west to east. Because of this, the Moon, the Sun and all other celestial objects appear to move from east to west across the sky.

Explanation

the term cyclone is defined as. A system of winds that are rotating inwards to an area of low barometric pressure

Cyclones are created by the differences in air pressure.

Explanation

Explanation

The bar is a unit of pressure, equal to 100,000 Pa. The bar is not an SI unit, but is accepted for use with SI by BIPM - The International Bureau of Weights and Measures

Explanation

Most gene mutations occur after you're born and aren't inherited.

A number of forces can cause gene mutations, such as smoking, radiation, viruses, cancer-causing chemicals (carcinogens), obesity, hormones, chronic inflammation and a lack of exercise.