Good afternoon future scientists, please work with your partner to complete the Measuring in SI...
-
Upload
rosaline-mitchell -
Category
Documents
-
view
213 -
download
0
Transcript of Good afternoon future scientists, please work with your partner to complete the Measuring in SI...
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/
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
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
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
This prefix changes the
base into a unit 1000x larger
This prefix changes the
base into a unit 1/10 as large as
the base
This prefix changes the
base into a unit 1/100 as large
as the base
This prefix changes the
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)
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
Click Here to Return to the Main Slide
#12 Coarse Adjustment – Used to make large changes in focus. NOTE Never use this when viewing on high power
Click Here to Return to the Main Slide
#13 Fine Adjustment – Used to make small adjustments of focus on high power
Click Here to Return to the Main Slide
#2 Rotating Nose Piece – Allows for quick change of objectives
Click Here to Return to the Main Slide
#5 High Power Objective – The highest magnification used. 40 X. NEVER use the course adjustment when using this lens.
Click Here to Return to the Main Slide
#7 Diaphragm – Use to vary the amount of light passing through the slide. Usually it is better if the amount of light is low.