Halle

So I'm homeschooled and I did this experiment with yeast and soda and water and balloons. It didn't work, and today is the deadline. I can't do it again because it takes 2 days... here is the assignment. Does anyone know what was supposed to happen?

The basic idea of this experiment is to measure the amount of carbon dioxide (CO2) released during the growth of yeast. The growth of the yeast stops when one of the nutrients required by the yeast is gone, or when the liquid gets too acidic (low pH) and kills the yeast. To conduct this experiment, follow the directions below.

Keep careful records as while collecting data. This is very important when analyzing, concluding, and submitting work.

Problem: What is the effect of sugar on the growth of yeast?

Procedure

Label each bottle to keep track of what each one contains--2 bottles of water, these are your control group, 2 bottles of soda, the experimental group, so that you can tell bottles containing the same solution (replicates) apart. Color is not a reliable means of identification--the caramel color used in cola is a carbohydrate and the yeast can eat it.

Put a level teaspoon of dried yeast in all bottles.

Seal the bottles tightly and shake all bottles the same amount of time to dissolve the yeast.

Remove the lids and stretch a balloon over the mouth of each bottle.

Record the diameters of the balloons,

Create a table in which to record your measurements.

Measure the diameter of the balloons approximately every 12

If a major event, either man-made or naturally occurring, were to completely wipe out one entire phylum of animals, what affect would it have on everything else?

What caused the poisoned mushrooms?

How deadly is this poison?

Why was it good for man to preserve food?

What are the conditions for this poison to be formed?

Why can bacteria not grow in our bodies?

What do we mean if we say something is heat resistant?

Why does heat not always kill these bacteria?

What can destroy the spores?

What foods best support these botulism producing bacteria?

Why is boiling a good way to prevent you being poisoned?

What are the basic signs of spoilage?

How does botulism affect a person? Be specific.

What is the treatment for botulism?

How does the FDA help when spoiled food is found?

Problem: -2x^2

So if I'm plugging in -2 for x would I do this...

-2(-2)^2

-2(4)

-8

Or...

-2(-2^2)

-2(-2)

8

Please help I have no idea how to do this and im homeschooled.----

a18=3362 a38=7362