 Science comes from a Latin word Scientia means “Knowledge”  Is a process that use observation and investigation to obtain knowledge.

 Physical science is the study of matter and energy  The two main branches of physical science are physics and chemistry.

What is physics? *science that deals with energy and matter and how they interact

1. Life Science : deals with living things. 2.Earth Science: Study of earth and space 3.Physical science: deals with matter and energy

 Is a step by step procedures to solve a problem  Six steps are seen in Scientific method

1.State the problem 2.Gather the information 3.Form a hypothesis. 4.Test the hypothesis 5. Analyze data 6.Draw conclusion (7.Proclaim to the world)

Date 08/19/10

 * Can be arise by observing repeated events.  *Can be arise from an activity that is not working

 Do research to gather information  Collect observations

 * is an educated guess  Is a possible explanation for a problem using what you know, or what you observed

 Perform an experiment  Or design an experiment.  Need two factors: _Variables (Experimental Factor) _ Controlled factors

Is a quantity that can have more than a single value. Can have different values.

Dependent Variables:(responding variables) * The value change according to the change in the variables Ex. The amount of growth of a plant(can be change due to the amount of water, fertilizer, sun etc…) Independent Variables ( manipulated Variables) * is the variables you can change to see how it will effect the dependent variables Ex. water, fertilizer, sun etc…)

 The factor that does not change their variables

 Record the data or calculations

Draw Conclusion  Based on data,you draw a conclusion  Ex. Out of 100, you got 98 same answer,then your hypothesis will be correct  From that you form a Theory.

 Set of hypotheses that have been supported by testing over and over again.  Can be change. Law:  Is a statement.  Never Change

 Is a visual idea, event, or object to help people better understanding  Something you can touch.

 Use computers to build models  Have complex equations that would be too long to calculate by hand

*Compares numerical data with a picture. *Different types have different uses

1.circle graphs, 2.bar graphs and 3.line graphs.

Often called a pie chart divided into parts easy to compare to whole amount.

wide columns used used for things like weight, height, and length. Compare quantities over a period of time.

 Line Graphs- compares sets of data, show change and patterns over time.

A title Labeled & numbered axes A consistent scale on each axis Always have an X and Y axis. Independent variables are always on X-axis. Dependent variables are always on Y-axis

 Is a gauge of how exact a measurement is Accuracy  Is the closeness of a measurement to the actual value of what is being measured.

a.precision: degree of exactness b.accuracy: extent to true value Neither Precise nor Accurate 2. Precise but not Accurate 3. Accurate but not Precise. 4. Accurate and Precise.