Scientific Method

When utilizing the scientific method, there are two types of variables. They are

Dependent and Independant

Place the 4 phases of scientific methods in order

Hypothesis,Experiment, Analysis, Report

How does a pillbug react when confronted with a noxious (unpleasant) substance?

Moves away from it

According to the results of the pillbug experiment,

Pillbugs tend to prefer cornstarch over sand

In order to be of scientific value, it is important that a hypothesis should be

Testable

Select all of the following that are required of a scientific result.

It has been tested using the scientific method It must be open to revision in the light of new data

Match the action to the appropriate phase of the scientific method

1. Hypothesis- Formulate a hypothesis and create a strategy 2. Experiment- Carry out the strategy, collect measurements 3. Analysis- Draw graphs, evaluate the hypothesis 4.Report- Document results

In the pillbug experiment, how many pillbugs did you need to use to get good information for the experiment?

10

A good scientific experiment is reproducible. What does this mean?

Anyone can conduct the same experiment in another lab and expect the same results

In the pillbug experiment, the substance used as the control was

Sand

In order to come to reliable conclusions about pillbug preferences, you needed to use the

Scientific method

Before you begin a scientific experiment, you should (Select all that apply)

State a hypothesis Decide on a strategy

Which best describes the diet of pillbugs?

Omnivore

Which of the following is a defense mechanism of pillbugs against predation?

Rolls up

In which phase of the scientific method is the strategy carried out and measurements collected?

Experiment

Some students consume large amounts of caffeinated drinks to help them stay alert when studying. You notice that many who engage in this practice seem to do poorly on exams. Suppose you want to investigate the relationship between caffeine consumption and exam performance. Which of the following statements would be an appropriate hypothesis?

Students who consume large amounts of caffeine while studying have lower exam scores than students that consume less caffeine while studying.

Imagine that you wish to compare two different diets that will be fed to tadpoles raised in a lab. One diet is a meat-based fish food, and the other is the traditional diet of boiled lettuce. You want to see if the meat-based diet will be associated with an increase in the average weight of the tadpoles. In your experiment you keep all other factors, such as tadpole density per pan, temperature, pH, and the amount of food the same. The only difference between your control and experimental groups is the type of food the tadpoles receive. Which is a good hypothesis for this tadpole experiment?

Tadpoles will be larger if fed a neat-based diet

What is the purpose of a control group in scientific experiments?

The control group undergoes standard or no treatment and serves as a baseline for a group receiving an experimental treatment