Today is Tuesday, September 8 th, 2015 Pre-Class: Name one piece of lab equipment and its function. In This Lesson: Lab Equipment (Lesson 4 of 4)

Today’s Agenda Strange life forms. –Really old stuff! Meet your lab equipment. –“Boy meets Erl…enmeyer Flask” Review games –Whoooo!!!!!11

By the end of this lesson… You should be able to select appropriate lab equipment based on the purpose they serve.

First, some lab safety… Eyewash Station Emergency Shower

1.

Beaker A container typically used for liquids or solids. Allows a scientist to heat, mix, stir, or otherwise manipulate liquids or solids easily. IS NOT USED FOR MEASURING VOLUME. Note where the beaker’s capacity (size) is listed.

2.

Erlenmeyer Flask Like a beaker, except it can be closed with a stopper/cork. Shape reduces evaporation and exposure.

3.

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.

4.

Test Tubes Used for containing liquids (or solids). Their size and shape allows for: –Lots of small samples. –Easy observations. –Easy manipulation.

5.

Eyedropper (or Medicine Dropper) Used to transfer small amounts of liquid. Similar to a pipette. Procedure: –Squeeze dropper. –Place in liquid. –Release.

6.

Microscope Magnifies the human sense of sight. Considered a light microscope because it needs light to provide an image.

7.

Safety Glasses To protect your eyes – who knew?! Glasses should be worn inside safety glasses, if applicable. The cabinet sterilizes them between uses.

8.

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.