Title: Biology 9/29/06 Objectives: Class Topics Chapter 2 Test

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Presentation transcript:

Title: Biology 9/29/06 Objectives: Class Topics Chapter 2 Test 1/16/2019 Title: Biology 9/29/06 Objectives: To assess learning about biochemistry. Class Topics Chapter 2 Test “Keep on beginning and failing. Each time you fail, start all over again, and you will grow stronger until you have accomplished a purpose - not the one you began with perhaps, but one you’ll be glad to remember.” Anne Sullivan Wednesday, January 16, 2019 6:55 PM

Class Assignments Chapter 2 Test 9/29/06 1/16/2019 Class Assignments What By When Chapter 2 Test 9/29/06 Chapter 2 Homework/Lab Corrections 10/3/06 Read 49-54 10/3/06 Due this class period Due next class period Due in the future

Posttest Activities Hand in test Choose one of the following 1/16/2019 Posttest Activities Hand in test Choose one of the following Read 49-54 Correct homework/labs

1/16/2019 1A & 4B Grade Sheet

1/16/2019 2A Grade Sheet

1/16/2019 3A Grade Sheet

1/16/2019 4A Grade Sheet

Characteristics of Microscopes 1/16/2019 Characteristics of Microscopes Magnification Image appears larger than it is Eyepiece 10x Objectives 4x, 10x, 40x* Resolution Clarity of the image Gets poorer with increased magnification

Microscopes Simple light microscope Compound light microscope One lens 1/16/2019 Microscopes Simple light microscope One lens Living or dead specimen Compound light microscope more than one lens resolution is a problem Must be transparent (very thin)

Microscopes Electron microscopes - use a beam of electrons (dead) 1/16/2019 Microscopes Electron microscopes - use a beam of electrons (dead) Transmission (TEM)- electrons pass through - very thin specimen Scanning (SEM)- electrons bounce off and get an image from the outside Scanning tunneling Uses a microprobe Can be used on living or dead organisms

Magnifications: Simple light – 5-25x Compound light - 2000x 1/16/2019 Magnifications: Simple light – 5-25x Compound light - 2000x Electron microscopes SEM 200,000x TEM 2,000,000x Scanning tunneling – 1,000,000,000x

Compound Light Microscope Parts 1/16/2019 Compound Light Microscope Parts Eyepiece Tube Revolving Nosepiece Objectives Base Stage Stage clips Diaphragm, iris, condenser From: http://www.microscopy.info/microscopy/light/glossary.aspx