Bio You are riding a bike:
How is the oxygen being used to create energy?
How is the food you choose to eat used to create energy?
Is any stored form of energy going to be converted and, if so, to what?

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%