What is Science? Review This slide show will present a question, followed by a slide with an acceptable answer. For some questions, there is a definite correct answer. For other questions, several answers may be correct.

What is SCIENCE? There are several correct answers to this question; list as many as you can.

A way to answer questions & solve problems How we understand the world around us A way or process used to investigate what is happening around you It provides possible answers What is SCIENCE?

We answer scientific questions & solve problems with 2 types of research. What are the two types?

We answer scientific questions and solve problems with 2 types of research. What are the two types? 1.Descriptive Research 2.Experimental Research

Describe DESCRIPTIVE RESEARCH

Based mainly on Observations Used when experiments are impossible to perform Involves the following: –Stating the research objective –Describing the research design –Eliminating bias Describe DESCRIPTIVE RESEARCH

Describe EXPERIMENTAL RESEARCH

Experimental research includes investigations that: Have variables Test hypotheses May have a control or control group Is a set of planned steps Tests one variable at a time

How do scientists OBSERVE?

Using the 5 senses: Hearing Touch Smell Sight Taste

Define HYPOTHESIS

A statement that can be tested by conducting an experiment Prior knowledge, new information, observations can be used to form a hypothesis

Describe VARIABLE

A part of an investigation that can be CHANGED

List the 3 TYPES OF VARIABLES

1.Independent Variable 2.Dependent Variable 3.Controlled Variable

Explain INDEPENDENT VARIABLE

The variable that can be changed during an experiment The variable that the scientists chooses to change The variable that may cause a change in the dependent variable

Explain DEPENDENT VARIABLE

The factor that is being measured in an experiment The variable that is measured by scientists The variable that may change because of the independent variable

Explain CONTROLLED VARIABLE (CONSTANT)

Variable that stays the same during an experiment Variable that is controlled by the scientist Variable that is not allowed to change

Explain how to RECORD DATA

Data Tables A way to record results and observations accurately Have a descriptive title Divided into columns & rows Shows the independent variable Provides a place to record the dependent variable Explain how to RECORD DATA

Describe how to ANALYZE DATA

Reduce the data with the best measure of central tendency Graph the data Look for patterns and relations Look at the shape of the graph Describe how to ANALYZE DATA

What do scientists do when they DRAW CONCLUSIONS?

Answer the original question State whether or not the hypothesis was supported (it is never “right” or “wrong”) Pose questions for further research

How do scientists COMMUNICATE the results of their work?

Reported in scientific journals Science journals Presentations to other scientists How do scientists COMMUNICATE the results of their work?

Why are REPEATED TRIALS necessary in an experiment?

To make sure results are valid The more trials conducted, the more likely the results are reliable To make sure a “fluke” is not considered the true result

Why do scientists use MODELS?

To save time and money when testing ideas that are Very large Very small Dangerous Time-consuming