Energy Notes

Energy: ability to do work Not created or destroyed Can transform (change form) Some energy is always lost when energy changes form.

How does all this relate to our energy pyramid activity? Sun started with all the points. Light energy from sun is converted to chemical energy Chemical energy = energy stored in chemicals Stored in bonds Energy was lost at each level of the pyramid 90% energy lost as heat Only 10% gained

True or false: Energy can be created or destroyed. What is chemical energy?

Other types of energy Kinetic- energy of motion Potential- stored energy (in food in chemical bonds)

ATP: Energy of cells

ATP is made in the mitochondria!!! A lot of energy is stored in phosphate bonds Broken by adding water Makes ADP (one less phosphate) Can be recharged by removing water Energy from food Energy for cellular work - H2O

What is ATP? What is the difference between potential and kinetic energy?

Energy flow in a nutshell Sun Plants- convert light energy into chemical energy Consumers- convert food into chemical energy (ATP)