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input
an input is whatever you put into a system.
output
an output is whatever comes out of a system
Photosynthesis formula
6CO2 + 6H20 + C6 H12 + 6O2
Stomata
Stomata are tiny openings or pores on the surface of leaves and stems that allow plants to exchange gases, such as taking in carbon dioxide and releasing oxygen.
Volume
the amount of space an object takes up. It is measured in liters. Measured in a graduated cylinder.
Mass
the amount of mass in an object. Mass can be measured in grams with a scale.
independent variable
What is being tested .. the one thing you change
dependent variable
the thing that changes because of the indepdent variable
constant
anything that stays the same in an experiment
control group
is the comparison group for which nothing is changed
Note 
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