@@Energy@@ @@is the ability to do work@@
Chemical energy is the energy stored in chemical bonds
One of the principal chemical compounds that living things use to store and release energy is called adenosine triphosphate (ATP)
Adenosine diphosphate (ADP) is similar to ATP but has only two phosphate groups instead of three
Cells can give off the energy stored in ATP by breaking the chemical bonds between the second and third phosphate groups
Cells use ATP in many ways
@@Most cells only have a small amount of ATP@@
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@@Living things that carry out photosynthesis use pigments to get energy from sunlight@@
Energy from the sun travels to Earth in the form of light
Plants gather the sun’s energy with light-absorbing molecules called pigments
Photosynthesis takes place inside organelles called chloroplasts
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@@Photosynthesis uses light energy to change water and carbon dioxide (reactants) into sugars and oxygen (products)@@
All of the steps of photosynthesis can be summed up in the following equation:
@@There are two stages of photosynthesis: light-dependent reactions and light-independent reactions@@
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