In This Lesson: Lab Equipment (Lesson 4 of 4) Today is Wednesday,September 11th, 2013 Pre-Class: Name one piece of lab equipment and its function.
Today’s Agenda • Strange life forms. • Really old stuff! • Reviewing life forms. • Quick video • Meet your lab equipment. • “Boy meets Erl…enmeyer Flask” • Review games • Whoooo!!!!!11
Lab Orientation • These notes would be good for the “Lab” section of your binder if you have one. • Note that this is a partial list. We will be adding more as the semester goes on. • I will give you a piece of equipment (photo). You find it at your table and guess as to its use and name.
First, some lab safety… • Eyewash Station • Emergency Shower
Beaker • A container typically used for liquids or solids. • Allows a scientist to heat, mix, stir, or otherwise manipulate liquids or solids easily. • Can be used to measure, but typically isn’t. • Note where the beaker’s capacity (size) is listed.
Erlenmeyer Flask • Like a beaker, except it can be closed with a stopper. • Shape reduces evaporation and exposure.
Graduated Cylinder • Used for measuring volume of liquids. • Note where the capacity (size) is written. • Try it! Put some water in there! • What do you notice about the water level? • The water line typically curves. • The line is called a meniscus. • Always measure to the bottom of the meniscus. http://www.jce.divched.org/JCESoft/Programs/CPL/Sample/modules/gradcyl/pic/00322409.jpg
Test Tubes • Used for containing liquids (or solids). • Their size and shape allows for: • Lots of small samples • Easy observations • Easy manipulation
Eyedropper (or Medicine Dropper) • Used to transfer small amounts of liquid. • Similar to a pipette. • Procedure: • Squeeze dropper. • Place in liquid. • Release.
Microscope • Magnifies the human sense of sight. • Considered a light microscope because it needs light to provide an image.
Safety Glasses • To protect your eyes – who knew?! • Glasses should be worn inside safety glasses, if applicable. • The cabinet sterilizes them between uses.
Slides • The “tray” for the sample to be viewed under the microscope. • Often are accompanied with a “cover slip,” a small piece of plastic that forms a sandwich around the sample to protect the microscope lens.
Time for Review • The first review concept is called The Whiparound (you know how teachers get). • Find some space in your notebook and write down the following: • Two things you learned about…experimental design. • Then stand up.