The global positioning system (GPS) is based on O large, expensive receivers O a

Question

The global positioning system (GPS) is based on O large, expensive receivers O aerial photography O data from satellites O infrared light sources O gravity waves from the Sun and Moon QUESTION 7 1 points Save The atmosphere, biosphere, lithosphere, and hydrosphere are considered to be discrete and independent subsystems of the Earth O True O False QUESTION 8 1 points Save Answer Which of the following substances is closely associated with the breakdówn of the ozone layer? O Nitrogen oxides o water vapor

Explanation / Answer

Ans for question without number: Data from satellites.

Explanation:GPS(Global Positioning System) is a satellite based navigation system having at least 24 satellites transmitting a unique signal and orbital paramaters which allow GPS devices on earth to compute the exact location.

Question 7 ans: False

Explanation: Atmosphere(Gases and particles which make up the air), Biosphere(living components), Lithosphere (Soil and Rock system) and Hydrosphere (Anything which is composed of H20 goes into it except for water vapor which is a gas is a part of Atmosphere) are all interconnected and they interact with each other to form earth system hence the statement for Q.7 is false.

Question 8 ans: Chlorofluorocarbons

Explanation: The primary cause of breakdown of ozone layer is due to the interference of chlorine containing gases like CFCs and Halocarbons(used as refrigerants and propellants). In the presence of UV light these gases breakdown and release Chlorine atoms which are highly unstable and react with ozone(O3) and breaks it down to oxygen through series of chain reactions.

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