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Questions and Answers List

Question	Answer
The major gas of the atmosphere is	Nitrogen
The percentage of fresh water on Earth is	3%
The percentage of salt water on Earth is	97%
What are the 4 Earth`s systems	Atmosphere - Biosphere , Geosphere , Hydrosphere
What are the five layes of the atmosphere starting from the closest to the earth	Troposphere , Stratosphere , Mesosphere , Thermosphere , Exosphere
In which atmosphere layer is the ozone layer ?	Stratosphere
Water that is stored in small cracks and open spaces beneath Earth`s surface	Ground Water
Frozen portion of water on Earth`s surface .	Cryosphere
What are the characteristics of minerals ?	Solid , inorganic , naturally occuring , Crystal Structure , Definite Chemical Composition
What are the physical properties of minerals ?	Colour , Hardness , Luster , Crystal shape , Streak .
Type of rocks that is formed when molten materials cools and hardens .	Igneous Rocks
Type of rocks that is formed when layers of sediments are compressed and then cemented together .	Sedimentary Rocks
Type of rocks that is formed under high temprature and pressure .	Metamorphic Rocks
List the Earth`s layers in order stating from the outermost .	Crust , Mantle , Outer core , Inner core