1/31/11 period 8

The first thing we did today was go over the homework:

1 a. In photosynthesis, what substances come in from the outside?

Light energy, water, and carbon dioxide.

b. What substances are produced?

glucose and oxygen

2. Write the overall equation for photosynthesis.

light energy+6CO2+6H2O-->C6H12O6+6O2

3. The purpose of cellular respiration is to release the energy from the carbohydrates and other organic molecules stored during photosynthesis.

4. Write the formula that shows the release of energy by a molecule of ATP.

C6H12O6+6O2-->6CO2+6H2O+ATP

The first paragraph is:

All living organisms respire in order to release energy from glucose. The energy released is stored as chemical energy in the form of a molecule called ATP. This molecule contains high energy bonds which, when broken down, release energy that is available for metabolic reactions within the cell. The waste products of respiration are carbon dioxide and water. Carbon dioxide is released to the air.

The second paragraph is:

Plants, algae, and photosynthetic bacteria produce their own food by photosynthesis. They take in carbon dioxide from the air or surrounding water and combine it with water through a complex series of reactions to form glucose. Solar energy is required to drive some of these reactions. The glucose produced may be used in respiration to provide energy, or may be converted to a storage form such as cellulose in plants.

After we set up our lab. You had to have three different experiments, changing one variable each time. Every group had a different experiment because you got to choose your variable.

This experiment was confusing for some people because they didn't know how much yeast to put in or how much liquid to use.

This is a picture of what our test tubes kind of looked like. We didn't have a medicine dropper but everything else was the same.

JR Period 8