Good afternoon future scientists, please work with your partner to complete the Measuring in SI worksheet. Do you know what is the fastest thing on earth?

Good afternoon future scientists, please work with your partner to complete the Measuring in SI worksheet. Do you know what is the fastest thing on earth?

http://www.nsta.org/

http://www.nsta.org/

Rules for using the microscope.1.Carry with two hands2.Always start with low power.3.Bring the stage up4.Place specimen on the slide and cover with a cover slip

This is a microscope slide.

This is a cover slip.

Part 2- The Microscope

•Invented in the 1500s

•Robert Hooke was the first to see cells

•Anton van Leeuwenhock was the first to see living things

Total Magnification Power

•The power of the eyepiece lens X the power of the objective lens being used.

•10x X 40x = 400x

International System (SI)

of Measurement

Advantages of the Metric System

• Creates an international system of measurement that uses the same standards world wide

• Ease of recording and calculating– All units are based on units of 10– Very precise measurements can be recorded

with decimals NOT fractions.

Subdivisions can be divided again and again for more

precision….1 unit

.01 unit

.001 unit

(Again by tenths)

“Base” Units• Unit of Length- Meter

– Based on the distance from the N. Pole to the equator

• Unit of Volume- Liter– The space an object takes up (solid, liquid or

gas)

• Unit of Mass- Gram– The amount of matter in an object

•A. FROM KILO TO MILLI

Important prefixes to know:

BASE UNIT

DECA 10x HECTA 100x

KILO 1000x

DECI .1

CENTI .01MILLI .001

The base of any unit determined by what you are

measuring

A prefix that makes a unit 10x

larger than the base

This prefix changes the

base into a unit 100x larger


base into a unit 1000x larger


base into a unit 1/10 as large as

the base


base into a unit 1/100 as large

as the base


base into a unit 1/1000 as large

as the base

Metric prefixes can be placed in front of all

metric units!

BASE UNIT

DECA HECTA KILO

DECI

CENTI

MILLI

Come up with a

sentence to order

the prefixes!

How are we going

to remember

these?

King

Henry

Died

By

Drinking

Chocolate

Milk

Metric ToolsBalance – used to

measure mass (grams)

Graduated cylinders and

beakers – used to measure

volume(liters)Meter stick –

used to measure length

(meters)

http://school.discovery.com/clipart/clip/scale.html

http://school.discovery.com/clipart/clip/flask3.html

Microscope• Used to magnify objects and make small

details more apparent.

• Compound microscopes have two lenses that magnify the object. The eye piece and the objective lens.

• Total magnification = eye piece X obj. lens

• 3 objective lenses: 4x, 10x, 40x

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

Click on Me

#9 Eye Piece—The part you look at with your eye. Usually 10 X magnification.

Click Here to Return to the Main Slide


#10 Arm – Used to safely transport microscope


#11 Stage – Slides are placed on this


#12 Coarse Adjustment – Used to make large changes in focus. NOTE Never use this when viewing on high power


#13 Fine Adjustment – Used to make small adjustments of focus on high power


#14 Base – Used to safely transport the microscope


#1 Body Tube – Reflects light up to the viewers eye


#2 Rotating Nose Piece – Allows for quick change of objectives


#3 Low Power Objective – The first lens you use. 4 X


#4 Medium Power Objective – The second lens you use. 10 X.


#5 High Power Objective – The highest magnification used. 40 X. NEVER use the course adjustment when using this lens.


#6 Stage Clips – Use to keep the slide in place.


#7 Diaphragm – Use to vary the amount of light passing through the slide. Usually it is better if the amount of light is low.


#8 Light Source – Sends light up through the diaphragm and through the slide for viewing

Documents

Good afternoon future scientists, please work with your partner to complete the Measuring in SI worksheet. Do you know what is the fastest thing on earth?