what does down to earth mean

Fossil fuels are energy-rich, combustible forms of carbon or compounds of carbon formed by the decomposition of biomass buried under the Earth over millions of year..

The earth is a huge sphere. The surface of which is made up of rock, soil and water. It is surrounded by air. The planet earth is only a tiny part of the universe, but it is the home of human beings and many other living things. Animals and plants live almost everywhere on the h..

Living organisms, like any non-living matter, are composed of some basic elements. The same physical laws such as gravitation, magnetism, thermodynamics etc., also bind living organisms. Yet, living organisms differ from non-living in fundamental characteristics such as cellular organisation,..

To avoid the risk of electric shocks, the metal of an electrical appliance is 'earthed'. Earthed means to connect the metal case of the appliance to the earth (at zero potential) by means of a metal wire (copper) called the earth wire. On..

. The earth's earliest atmosphere may have contained hydrogen, helium, methane and ammonia, similar to the present atmosphere of Jupiter. Or it may have contained a large amount of carbon dioxide, as does the atmosphere of Venus. The earth's earliest atmosphere probabl..

The ratio of mean distance of the Mars from the Sun to the mean distance of the Earth from the Sun is 3 : 2. If the mean distance of the Earth from the Sun is 240 million miles, then what is the mean distance of the Mars from the..

Living organisms, like any non-living matter, are composed of some basic elements. The same physical laws such as gravitation, magnetism, thermodynamics etc., also bind living organisms. Yet, living organisms differ from non-living in fundamental characteristics such as cellular organisation,..

The value of acceleration due to gravity on Earth is 9.8 m/s 2 . This means that when a body falls freely towards the Earth its velocity increases at the rate o..

The mean distance of the Earth from the Moon is about 384,400 km. Write the distance in scientific notation. => 3.844 x 10 5 or 3.844 x 10 7 or 3.844 x 10 6 or None of the above..

The mean distance of the Earth from the Moon is about 384,400 km. Write the distance in scientific notation. => 1.922 × 10 5 km or 3.844 × 10 5 km or 3844 km or 0.3844 × 10 5 km..