Chapter 1 Exploring Science

What does a scientist do? They gather information from observations, look for patterns, form hypotheses, test hypothesis, experiment, analyze results, draw conclusions and communicate results.

Experiment An organized procedure for testing a hypothesis.

When doing an experiment, it is important to follow certain guidelines to reduce the chance of reaching wrong conclusions.

An Experiment has 2 set-ups. 1.) Control Set-Up 2.) Experimental Set-Up

Control Set-Up This is the standard for comparison. How things would naturally happen.

Experimental Set-Up This contains the variable being tested. Only one variable can be tested at one time.

Independent Variable The factor adjusted by the experimenter (the person doing the test). * laundry detergent * color of water * amount of sun light

Dependent Variable The factor whose value depends upon the value of the independent variable. * # of stains remaining * height of plants * # of flowers

Scientific Method Series of steps or guidelines followed by scientists when performing an experiment. * the better they follow the steps, the more accurate the results

5 Steps to the Scientific Method 1.) Determine the Problem. 2.) Make (Form) a Hypothesis. 3.) Test the Hypothesis. 4.) Record and Analyze the Results. 5.) Draw a Conclusion.

3 Ways to Test a Hypothesis. 1.) Experiment 2.) Model 3.) Observe

Most tests of a hypothesis will involve more than one way of testing.

Data Another word used when describing the results of an experiment. * results are usually recorded in charts, tables, graphs and pictures

For a conclusion to be considered valid, the results must be able to be repeated. * accurate records are important in science

When doing experiments in science, SAFETY always comes first!

Most experiments have warning symbols to remind scientists what the hazards are for that test. * copy 4 safety symbols from the first page in your book * give the meaning of your symbols

The End