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What is replication in an experiment and why is it important?

Summary. Getting the same result when an experiment is repeated is called replication. Replication is important in science so scientists can “check their work.” The result of an investigation is not likely to be well accepted unless the investigation is repeated many times and the same result is always obtained.

Why do scientists try to replicate and duplicate a discovery?

Scientists aim for their studies to be replicable — meaning that another researcher could perform a similar investigation and obtain the same basic results. When a study cannot be replicated, it suggests that our current understanding of the study system or our methods of testing are insufficient.

How many times should you repeat an experiment to know if the hypothesis is true?

For a typical experiment, you should plan to repeat the experiment at least three times. The more you test the experiment, the more valid your results.

How many times should you replicate an experiment?

For most types of experiment, there is an unstated requirement that the work be reproducible, at least once, in an independent experiment, with a strong preference for reproducibility in at least three experiments.

Why do we repeat experiments?

Why is the ability to repeat experiments important? Replication lets you see patterns and trends in your results. This is affirmative for your work, making it stronger and better able to support your claims. This helps maintain integrity of data.

How can you improve an experiment?

You can increase the validity of an experiment by controlling more variables, improving measurement technique, increasing randomization to reduce sample bias, blinding the experiment, and adding control or placebo groups.

Why is it important to run more than one trial of an experiment?

When we do experiments it’s a good idea to do multiple trials, that is, do the same experiment lots of times. When we do multiple trials of the same experiment, we can make sure that our results are consistent and not altered by random events. Multiple trials can be done at one time.

How does repeating an experiment increase accuracy?

To repeat an experiment, under the same conditions, allows you to (a) estimate the variability of the results (how close to each other they are) and (b) to increase the accuracy of the estimate (assuming that no bias – systematic error – is present).

What do the conclusions tell about the experiment?

Your conclusions summarize how your results support or contradict your original hypothesis: Include key facts from your background research to help explain your results as needed. State whether your results support or contradict your hypothesis.

What was the question in Redi’s experiment?

Redi’s Problem Hypothesis: Maggots come from flies. Redi put meat into three separate jars.

What was Spallanzani’s experiment?

Spallanzani’s experiment showed that it is not an inherent feature of matter, and that it can be destroyed by an hour of boiling. As the microbes did not re-appear as long as the material was hermetically sealed, he proposed that microbes move through the air and that they could be killed through boiling.

What was the variable in his experiment?

The things that are changing in an experiment are called variables. A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled.

How did Pasteur’s experiment disprove spontaneous generation?

To disprove the theory of spontaneous generation, Louis Pasteur devised a way to flask that allowed oxygen in, but prevented dust from entering. The broth did not show signs of life until he broke off the neck of the flask allowing dust, and therefore microbes, to enter.

Is the idea of spontaneous generation supported by Pasteur’s experiment?

The theory of spontaneous generation states that life arose from nonliving matter. Louis Pasteur is credited with conclusively disproving the theory of spontaneous generation with his famous swan-neck flask experiment. He subsequently proposed that “life only comes from life.”

What was the variable in Pasteur’s experiment?

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

What was the independent variable in Redi’s experiment?

Redi’s Experimental Design

A B
In Redi’s experiment, what is the independent variable? the type of covering placed on each jar
In Redi’s experiment, what is the dependent variable? the appearance of maggots on the meat in the jars
In Redi’s experiment, what is the control? the uncovered (open) jar of meat

What are some examples of spontaneous generation?

This is the idea of spontaneous generation, an obsolete theory that states that living organisms can originate from inanimate objects. Other common examples of spontaneous generation were that dust creates fleas, maggots arise from rotting meat, and bread or wheat left in a dark corner produces mice.

Why is the idea of spontaneous generation incorrect?

It was once believed that life could come from nonliving things, such as mice from corn, flies from bovine manure, maggots from rotting meat, and fish from the mud of previously dry lakes. Spontaneous generation is the incorrect hypothesis that nonliving things are capable of producing life.