Warm Up Greater than Less than or equal

Warm Up • Greater than, Less than or equal (<, >, or =) • • • 63 cm 5 g 1, 500 m. L 536 cm 43 mg 3. 6 m 6 m 508 mg 1. 5 L 53. 6 dm 5 g 36 cm

Warm Up

The Metric System

The Metric System and SI Units • Scientists use International System (SI) units for measurements of -distance -volume -mass -temperature • The International System is based on multiples of ten and the metric system of measurement.

The Metric System and SI Units

The Metric System and SI Units

Symbols in Metrics • Distance: -km, hm, dam, m, dm, cm, mm, μm • Volume: -k. L, h. L, da. L, l, d. L, c. L, m. L, μL • Mass: -kg, hg, dag, g, dg, cg, mg, μg

Let’s Practice Using SI Units • • • Width of a door frame. Length of GA 400 A large paperclip. Life Science Text Book. Half a bottle of Coke. The amount of shampoo in a bottle-

A Special Situation • Volume can be measured with each of the following units: • 1 ml = 1 cm 3 = 1 cc

Temperature • Temperature is measured in Celsius (C°). • 30° is hot. • 20° is nice. • 10° is chilly. • 0° is ice.

Let’s Review Metric Conversions

Changing Metric Units

k h da d c m

k h da d 8 m = _____cm c m

k h da m d 8 m = _____cm c m

km h da m d 8 m = _____cm c m

km hm da m d 8 m = _____cm c m

km hm dam m d 8 m = _____cm c m

km hm dam m dm 8 m = _____cm c m

km hm dam m dm 8 m = _____cm cm m

km hm dam m dm 8 m = _____cm cm mm

km hm dam m dm 8 8 m = _____cm cm mm

km hm dam m dm 8 8 m = _____cm cm mm

km hm dam m dm 8. 8 m = _____cm cm mm

km hm dam m 8. dm 80. 8 m = _____cm cm mm

km hm dam m 8 dm 80 8 m = _____cm cm 800. mm

km hm dam m 8 dm 80 8 m = _____cm cm 800. mm

km hm dam m 8 dm 80 8 m = 800 cm cm 800. mm

Your Turn

The Microscope

Compound Light Microscope Main Parts • Tube w/ lenses • Magnifies • Stage objects too small • Light source to see easily with the naked eye.

Total Magnification Power • • Multiply the magnification of the eye-piece by the highest objective lens (Eye Piece X Objective Lens). Ex: If the eye piece on a microscope says “ 5 x” and the high power objective lens says “ 50”, what is the total magnifying power of the microscope? 250 x

Field of View • Field of view is created as light is focused up on the stage from the light source. • Adjust by turning the diaphragm to allow light through to the stage. • Images appear blurred when the resolving power of the lens is not good.