All important scientific discoveries are made by professional scientists.

Scientific models have two basic types.

Variables are those factors that can be changed in an experiment.

When observing and recording the results of an experiment, observations may include both measurements and descriptions.

Using scientific methods means doing a professional experiment.

Laboratory safety is not an important concern for scientists.

If the results of a study do not support a hypothesis, it means that the experiment failed.

Scientific models are often used to help scientists understand a problem.

Computer models can be touched.

Einstein's idea model for his theory of relativity was also built as a physical model.

Once a scientific model has been created, it cannot be changed.

Although people of different races, sexes, and cultures have made scientific discoveries, they have all been adults, older than you.

The only way to test a hypothesis is by conducting a controlled experiement.

An important part of planning an experiment is determining the materials needed.

Data tables help you to organize your observations and test results.

Data are always numerical measurements.

A hypothesis is a decision based on the results of the experiment.

If it takes more than a few experiments to find the answer to a particular problem, it means that the scientist has failed and is not a very good researcher.

It is often necessary to look at the same problem in different ways in order to find an answer.

Models may change as new discoveries are made.

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