Metric system

1
Metric system

• Kilo 1000
• Hecto 100
• Deka 10
• BASE
• Deci .1
• Centi .01
• Milli .001

2
Summary

• If the unit you are moving to is smaller then
  you need a larger number to represent it
• If the unit you are moving to is larger then
  you need a smaller number to represent it

3
Metric Practice

• How many decimals would we move?
• 10 cm to mm
• 34 dm to km
• 57 to kilos
• 1000 mm to hectometers

4
Protractors

• Who has used them before?
• What were some problems?
• Think triangles?

5
Graphing

• X Y axis
• Title , labels and a legend (key)
• Constants (X axis)
• Variables (Change Y axis)
• Independent variables X axis
• Dependent variables Y axis

6
Different kinds of graphs

• Lines show us trends or how data changed over
  time
• Bars compare information by counting
• Circle or pie show how a fixed quantity is
  broken down into parts

7
Earth Science Terms

• Geologist
• Astronomer
• Oceanographer
• Meteorologist
• Geology
• Meteorology
• Paleontology
• Oceanography

8
Earth is Round?How did we know this before 1500?

• Shadow of a moon?
• Ships mast first part to approach the horizon
• When sailing N to S sailors notice the sky
  changed in appearance.
• What changed? Note page 17 in your book.

9
Density

• Amount of material (mass in a given space)
• Resistance of a fluid
• High resists flow
• Low easy
• Volume D m/v

10
Earths Structure

• Inner core approx 1200 Km
• Outer core liquid iron / nickel
• Mantle heavy rocks rich in iron, magnesium,
  silicon
• Crust lighter rocks

11
Earth Layers

• Average density is 5.5 g3
• Rocks average density is 2.8 g3
• Mass is the material in an object or substance
• Volume is amount of space that is taken up
• V L x W x H

12
Protoplanet Hypothesis

• Cloud of gas and dust
• Passing a star this mass shrank
• The compression of this material used so much
  energy that a reaction occurred. (Hydrogen
  fusion)

13
Circumference

• Know how to solve a problem using the
  Eratosthenes method. (pg 19)
• We will practice this.