http://www.clarkecounty.jhs.schoolinsites.com/

1
http//www.clarkecounty.jhs.schoolinsites.com/
2

• Quick Review
• Scientific Method
• Metric System

3
The Scientific Method

• 1 make an observation.
• 2 ask a question.
• 3 form a hypothesis (a possible explanation for
  an event)

4

• 4 Set up an experiment to test the hypothesis.
• 5 collect data from the experiment.
• 6 Draw a conclusion from the data.

5

• 7 Make a prediction based on the conclusion.

6
Parts of an experiment.

• In an experiment we have a CONTROL GROUP and an
  EXPERIMENTAL GROUP. Both groups are treated
  exactly the same except for one variable.

7

• The control group is designed without the
  variable, the experimental group contains the
  variable being tested. Only one variable can be
  tested at a time.

8
Presenting Scientific Data

• Data may be reported using graphs, charts,
  tables, models, or diagrams.

9
Scientific Measurement

• Scientists use SI units as a standard way to
  measure things. SI stands for Le Systeme
  International d Unites.

10

• SI units are based on the metric system which was
  established in France about 200 years ago. It is
  based on multiples of ten.

11

• The basic unit of mass in the metric system is
  the gram. (mass is the amount of matter in an
  object)
• The basic unit of liquid volume in the metric
  system is the liter.

12

• (volume is the amount of space an object takes
  up)
• The basic unit of length in the metric system is
  the meter.

13

• The volume of a cube measuring 10 cm on each side
  is one liter.
• The volume of a cube measuring 1 cm on each side
  is one milliliter or 1 cc.

14

• A cc (cubic centimeter) of water has a mass of 1
  gram.