Introduction to the Cell Microscope 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 Cells Onion cells Onion cell short video

Characteristics of Living Things ( 4 according to your textbook) All living things... Grow Move Respond to stimuli Reproduce

Growth A result of the cells in your body increasing in number New cells will grow to replace old cells that die.

Movement A 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

Stimulus: anything that causes an organism to react. Respond to Stimuli Stimulus: anything that causes an organism to react. Maybe external or internal 17

Identify the stimulus & response

Reproduction Producing 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/lessonplans/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

Coarse adjustment knob Fine adjustment knob Objective lenses 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

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 Microscope How do we carry a microscope? How do we put away a microscope?

Links YouTube.com The Light Microscope (first 8 minutes) Science Skills – Microscope (5 minutes) YouTube.com How to correctly use a microscope (1min43sec) the flip side Links 6

Microscope Mania http://sciencespot.net/Media/micromyspic.pdf Best link: http://mason.k12.il.us/havanajh/mystery/

Magnification Power The 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 Game http://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.