The law of thermodynamics states that energy can't be created or destroyed. two natural sources of energy on earth are the a. first, sun and core of earth b. second, sun and rock c. second, sun and biosphere d. third, core of earth and hydrosphere

Option A, first, Sun and core of Earth

Explanation:

According to first law of thermodynamics,  

An energy can never be created nor destroyed, it can only be converted from one form to other and therefore the first law of thermodynamics is known as law of conservation of energy.  

There are only few energy sources for planet earth – Solar energy, gravity, rotation of earth and radioactive energy

Solar energy is the prominent source of energy that drives several natural process like winds, hydrologic cycle, biosphere ecological cycle , and also derives the overall climate system . While the earth core causes gravitational force which is very essential for several natural process like rotation, tides, etc.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

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explanation:

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