http://highered.mcgraw-hill.com/sites/0070723648/student_view0/online_student_text.html

The  Username is  DiscSci8 and the Password is Student8.

Today we will:Define cell

Learn what makes a living thing different from a non-living thing

Learn how to handle a microscope

Learn the parts of the microscope

All living things are made of cells (cell theory).

Define cell as:the basic, functional unit of life

http://web.buddyproject.org/web019/web019/blood.html

View Model of a Cell

Observing Plant and Animal CellsOnion cells

Onion cell short video

Characteristics of Living Things ( 4 according to your textbook)All living things...1.Grow2.Move3.Respond to stimuli4.Reproduce

GrowthA result of the cells in your body increasing in number

New cells will grow to replace old cells that die.

MovementA change in position, shape or location (locomotion)

Animals might have wings, legs or fins to move from one location to another.

http://www.kidzone.ws/animals/monarch_butterfly.htm

http://www.vanaqua.org/education/aquafacts/killerwhales.html

Plants might have stems that change position with the sun.

The sensitivity plant:

http://www.youtube.com/watch?v=BVU1YuDjwd8

Respond to StimuliStimulus: anything that causes an organism to react.

Maybe external or internal

Identify the stimulus & response

ReproductionProducing more of the same kind (offspring)

We know that all living things are made up of cells.

How big are cells?http://learn.genetics.utah.edu/content/begin/cells/scale/

How do we see those cells?

Under the microscope….http://school.discoveryeducation.com/lessonp

lans/interact/vemwindow.html

The microscope

Who invented the first microscope?

Links: Text history Timeline Short history A few good links such as founding fathers Nice history with pictures

The Compound Light Microscope

PART FUNCTION

Eyepiece

Body tube (barrel)

Coarse adjustment knob

Fine adjustment knob

Objective lenses

Revolving nosepiece

Stage

Iris diaphragm

Light source

Base

Arm

The Compound Light Microscope

PART FUNCTION

Eyepiece For viewing. Magnifies 10x.

Body tube (barrel) Holds the eye piece.

Coarse adjustment knob Used to focus at low or medium power.

Fine adjustment knob Used to focus at high power.

Objective lenses 3. Used to magnify.

Revolving nosepiece Holds the objective lenses.

Stage Where you put the slide.

Iris diaphragm Controls the amount of light

Light source Supplies light.

Base Supports the microscope.

Arm Supports eyepiece.

Quiz – Quiz Trade 11 Microscope terms.

classtools.net

Handling the MicroscopeHow do we carry a microscope?

How do we put away a microscope?

6

LinksThe Light Microscope (first 8 minutes)Science Skills – Microscope (5 minutes)

YouTube.comHow to correctly use a microscope (1min43sec)

the flip side

Microscope Maniahttp://sciencespot.net/Media/micromyspic.pdf

Best link:http://mason.k12.il.us/havanajh/mystery/

Magnification PowerThe magnification power of a lens is the

number of times larger an image looks under the lens.

If you look on each objective there is a number which states its magnification power.

Usually:Low power (4x), Medium power (10x), High power (40x) and the ocular lens is (10x)

HOW MUCH BIGGER IS IT?To calculate the total magnification of each

objective lens multiply the power of the ocular lens by the power of the objective lens.

Example for total magnification using low power:

Low power objective lens x eyepiece lens

4 x 10 = 40. The total magnification using low power is 40.

The scoop on the scope…We can see better details with higher magnification but we can not see as much of the image!

Question????What are the powers of magnification for

each of the objective lenses on our microscopes?

Low Power –Medium Power-High Power-

Remember …Total Magnification is

power of objective lens

power of eyepiece lens

Matching Gamehttp://www.quia.com/mc/509402.html

Questions…1. What is a cell?

2. What is the total magnification for the medium power objective lens?

What are the four characteristics of living things?

Homework… page 401 Questions 2, 3, 5,6,7

No need to write the answers down …. Yet…. But think about how you would answer these questions.