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Answer 1

Answer:

Explanation: 1) They need energy to stay alive. They need the energy to perform functions such as growth, maintaining balance, repair, reproduction, movement, and defense. This means all living organisms must obtain and use energy to live.

2) Respiration releases energy from glucose in the form of ATP. This occurs in all living cells. Aerobic respiration (with oxygen) releases more energy than anaerobic respiration (without oxygen).

The word equation for aerobic respiration is:

glucose + oxygen → carbon dioxide + water (+ energy released)

C6H12O6 + 6O2 → 6CO2 + 6H2O

3) We breathe because oxygen is needed to burn the fuel [sugars and fatty acids] in our cells to produce energy.) ... (The energy station of the cells, called mitochondria, process oxygen to power the cells. As part of the combustion process, carbon dioxide is released.)

4) Fogging up a cold window. When you breathe out, there is water vapor in your breath. ... The water vapor in your breath is warmer than the outside air. The water vapor molecules transfer energy to the colder air.

Answer 2

Answer:

1. To do work or to make food.

2. 6O2 + C6H12O6+--------->6CO2+6H2O+ATP

      |             |                               |         |          |

 Oxygen    Sugar      Carbon Dioxide Water Usable energy

( Equation for Humans)

glucose(sugar) + oxygen -----> carbon dioxide + water + energy released

C6H12O6 + 6O2 ----> 6CO2 + 6H2O

( Equation for plants)

3. O2(Oxygen)  is essential for producing energy

4. A cold window steams up when you breathe on it because the air for your mouth has a very small area to escape, hence when you breathe on it sticks to the cold window.

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