Question

!!! Three Medal Question !!!
- Define energy, and state where living things get the energy they need.
- How does photosynthesis change energy?
- What are the stages of photosynthesis? Which stage occurs first?

Answer 1

Energy is defined in all it's simplicity as: the ability to do work against an opposing force.
Now where does the energy come from? Well all organisms transform energy and matter from their surroundings. However to be a little more specific, what that actually provide energy is the flow of electrons, that is redox reactions are where we find our energy.
Try name the two ways organisms can obtain energy from their surroundings.

I try write the photosynthesis reaction (not 100% correct however, but it is for learning purposes), then try say what photosynthesis does with the energy.
\(\bf 6 CO_{2}+6 H_{2}O + \it{hv} \bf \to C_{6}H_{12}O_{6} + 6 O_{2}\)
\(hv\) is an expression for sunlight (Planck's relation)

Photosynthesis can be said to be split into two parts:
the light reactions and \(\bf CO_{2}\) assimilation. Can you guess what we might need first? I can say that the \(\bf CO_{2}\) assimilation require energy.

Answer 2

for the second question can you write it in words ! pls

Answer 3

and sorry for the late reply

Answer 4

Not a problem :)
Photosynthesis change energy from sunlight into chemical energy. (stores the energy in glucose or other organic compounds)

Answer 5

and are there only two stages ?

Answer 6

I like to say so yes. Surely the two stages can be broken into multiple processes.

Answer 7

Thank You soo Much ! You've been a great Help =)

Answer 8

No problems at all. :) if you want elaboration let me know.