Correct Answer : Mercury, Venus, Earth, Mars
Correct Answer : Palaeontology
The study of fossils is called paleontology, from the Greek meaning 'ancient (paleo-) being (onto-) study (-logy)'. Scientists who study fossils are called paleontologists.
Correct Answer : method of breeding crops to increase their nutritional value
Correct Answer : Emigration
Correct Answer : Volcano
Volcanoes are known as the safety valves of nature because they periodically release the pressure that builds up because of tectonic activity in the Earth's crust and even lower layers.
Correct Answer : Coal, Natural Gas and Petroleum
Traditional thermal power plants: also called combustion power plants, they operate with energy produced by a steam boiler fueled by coal, natural gas, heating oil, as well as by biomass. The steam activates a turbine which, in turn, drives an alternator to produce electricity.
Correct Answer : Salt Water
Halophytes are salt-tolerant plants that grow in waters with high salinity, such as in mangrove swamps, marshes, seashores and saline semi-deserts. Only two per cent of the plant species found on the Earth are halophytes.
Correct Answer : describing their qualifications
Correct Answer : Geothermal Energy
Correct Answer : 0-4%
Water vapor concentration varies from trace amounts in Polar Regions to nearly 4 percent in the tropics. Most prevalent gases are nitrogen (78 percent) and oxygen (21 percent), with the remaining 1- percent consisting of argon, (. 9 percent) and traces of hydrogen ozone ( a form of oxygen), and other constituents.
