1. 3.4 Energy & Metabolism
I. ________ A. Def- the ability to ______ or _______ matter
B. Forms
1. Light, _______, chemical, ________, ___________, etc.
II. Changing Matter
A. __________ Change
1. occurs when only the ______ or _________ of the matter changes

2. 2. The substances do ____ change into __________substances
3. ex- adding ______ to iced tea
B. _________ Change
1. Occurs when a substance changes into a new __________
2. ex– ______ __________
C. Conservation of _______
1. _______ is neither created nor ___________ in any change

3. D. Conservation of_________
1. Energy is neither created nor destroyed, it changes ______
III. __________Reactions
A. __________
1. the substance that is ________ in a chemical reaction
B. _________
1. the new ___________ that is formed

4. C. ___________Energy
1. The minimum _____energy that colliding particles need to start a __________reaction
D. ___________
1. Chemical reactions can only occur when the __________ energy is available and the correct atoms are __________.

5. IV. Biological Reactions
1. is a molecule that _________ the _________ of a reaction
B. __________Activity
1. _________ site
a. the _______ where the ___________ takes place
2. _____________
a. reactant in a chemical reaction

6. 3. Enzymes and substrates. work like a _______ & _____or
C. _____________
1. Breaking down of your _____ into useful ________ (____)
2. Use _________to reduce the _________ energy
3. Carried out in a _______ by ________ process
4. Very little _____ is produced