sience Homework help ?'s #2???

Question

I need help with these:
1)Describe how you might use 2 plants to demonstarte the importance of the sun to the process of photosynthesis.
2)Use a formula to show how light energy is converted to chemical energy in photosynthesis.
3)The term respiration is also used to desribe breathing. How is the cellular respiration that releases energy from glucose like breathing?
4) Contrast the way energy is released from simple food molecules in the presence of oxegen with the way it is released in the absence of oxegen.

PLEASE help me! I don't get these ?'s and i need help!
Thanx!
xoxo
yarely

Answer 1

1. Place one plant in the sun and one plant under a box. Measure how much they grow.
2. 6 CO2 + 6 H2O --> C6H12O6 + 6 O2
3. Cellular respiration uses oxygen and gives off carbon dioxide. Our respiration system takes in oxygen and gives off carbon dioxide to supply the needs of cellular respiration.
4. With oxygen glucose is broken down into pretty small bits and releases enough energy to make 38 ATPs. Without oxygen glucose is broken down into two relatively large molecules of pyruvic acid and only releases enough energy to make a net gain of 2 ATPs.