Does rotting meat turn into or produce the flies? Hypothesis: Rotten meat does not turn into flies. Only flies can make more flies. Prediction: If meat cannot turn into flies, rotting meat in a sealed (fly-proof) container should not produce flies or maggots.

Tip: Maggots are the larvae of flies. They grow on meat because females lay eggs in a substance that provides food for the maggots after they hatch. Meat is a preferred source of maggot food for many species of flies.

The theory of spontaneous generation held that living creatures could arise from nonliving matter and that such processes were commonplace and regular. It was hypothesized that certain forms, such as fleas, could arise from inanimate matter such as dust, or that maggots could arise from dead flesh.

Redi went on to demonstrate that dead maggots or flies would not generate new flies when placed on rotting meat in a sealed jar, whereas live maggots or flies would. This disproved both the existence of some essential component in once-living organisms, and the necessity of fresh air to generate life.

Redi’s hypothesis suggests that flies lay eggs that produce maggots, thus refuting the theory of spontaneous generation.

Pasteur’s hypothesis was that if cells could arise from nonliving substances, then they should appear spontaneously in sterile broth. To test his hypothesis, he created two treatment groups: a broth that was exposed to a source of microbial cells, and a broth that was not.

A conclusion is a summary of the results of an experiment, with a discussion of whether the results support or contradict the original hypothesis. Typically, you begin by restating the goals of the experiment. You might also briefly state whether the experiment successfully achieved those goals.

A good conclusion should do a few things:

• Restate your thesis.
• Synthesize or summarize your major points.
• Make the context of your argument clear.

My hypothesis was that Energizer would last the longest in all of the devices tested. My results do support my hypothesis. I think the tests I did went smoothly and I had no problems, except for the fact that the batteries recover some of their voltage if they are not running in something.

Steps

1. Restate: Restate the lab experiment. Describe the assignment.
2. Explain: Explain the purpose of the lab. What were you trying to figure out or discover?
3. Results: Explain your results.
4. Uncertainties: Account for uncertainties and errors.
5. New: Discuss new questions or discoveries that emerged from the experiment.

Sentence #1: restate the thesis by making the same point with other words (paraphrase). ~ Example: Thesis: “Dogs are better pets than cats.” Paraphrased: “Dogs make the best pets in the world.”

CONCLUSION. Pasteur’s experiment showed that microbes cannot arise from nonliving materials under the conditions that existed on Earth during his lifetime. But his experiment did not prove that spontaneous generation never occurred. Eons ago, conditions on Earth and in the atmosphere above it were vastly different.

He concluded that germs in the air were able to fall unobstructed down the straight-necked flask and contaminate the broth. The other flask, however, trapped germs in its curved neck, preventing them from reaching the broth, which never changed color or became cloudy.

Answer: Redi went on to demonstrate that dead maggots or flies would not generate new flies when placed on rotting meat in a sealed jar, whereas live maggots or flies would. This disproved both the existence of some essential component in once-living organisms, and the necessity of fresh air to generate life.

Pasteur then observed the response of the dependent variable (the growth of microorganisms) in response to the independent variable (the design of the flask).