Well the earth's atmosphere is kept around the earth by gravity its a little different than a green house but its the same idea .the gravity keeps a barrier between space and the earth and it acts like a green house the sun goes threw the atmosphere and is magnified by the humidity and t reflections which are the clouds. it all kept around the earth by the pressure the gravity causes and it also contains any and all pollutants we release into the air. the barrier the gravity makes is like the glass in the green house .the plants and trees on the earth produce the oxygen we breath and is kept down around the earth because the earth spins and causes centrifugal force
Photosynthesis is the chemical process used in plants to convert energy in the form of sunlight into chemical energy in the form of sugar or other carbohydrates.
<span><span>General equation:<span><span>carbon dioxide + electron donor + light energy ==> carbohydrate + oxidized electron donor + water</span><span>CO2 + 2H2A + photons ==> [CH2O] + 2A + H2O
</span></span></span><span>Net equation: Because glucose, a six carbon sugar, is often an intermediate product of photosynthesis, the net equation is frequently written as:</span></span>carbon dioxide + water + light energy ==> glucose + oxygen + water<span>6CO2 + 12H2O + Light Energy ==> C6H12O6 + 6O2 + 6H2O</span><span>Balanced equation: The net equation above can be simplified as:<span><span>6CO2 + 6H2O + Light Energy </span>==><span> C6H12O6 + 6O<span>2</span></span></span></span>
B. Velocity is correct because the truck movement is described with a magnitude and direction and the direction is constant.