1. Introduction to Science
Lesson 5: Lab Equipment

2. Bell Work Name and describe 2 of branches of Science.
What are the 4 step to the Technological Design?
How does Technological Design differ from the Scientific Method?

3. Today’s Agenda
Bell Work
Guided Notes
Exit Slip

4. Review Lab Safety

5. Lab Safety
One of the first things a scientist learns is how a lab operates.
This includes being safe in the lab.
While working in the lab can be very exciting, it can also be very dangerous if proper safety rules are not followed correctly.
The next few slides will discuss some of the safety precautions for this science lab.

6. General Lab Procedures
Know where all safety equipment and the first aid kit are located.
Tell the teacher IMMEDIATELY of any injury.
Read all directions BEFORE conducting the lab. Follow only the directions in the lab.
Do not begin any lab until you are instructed to do so.
Follow all rules set for the lab. Any deviation from the rules will result in your removal from the lab.
No one leaves the classroom until the lab is all cleaned up. Everyone is responsible for cleaning up before they leave.

7. Dress Code
Wear safety goggles whenever you are working with any substance which can get into your eye.
Wear a laboratory apron or coat whenever you are working with materials which can get onto your clothing.
Tie back long hair.
Remove necklaces and bracelets which can hang down and touch the materials being used.

8. Glassware and Sharp Objects
Use only clean glassware that is instructed per the procedures of the lab.
If you break glass, tell the teacher IMMEDIATELY. Do NOT try to clean it up yourself.
When using sharp objects, point them away from yourself and wear goggles at all times.
After using glassware, clean it according to the teacher’s instructions.

9. Lab Equipment

10. Lab Equipment
When working in any lab, it is important to be familiar with the equipment.

11. Test Tubes Used to Do Not use: Use a test tube rack to hold test tubes
Transfer liquids
Mix liquids
Heat liquids
Do Not use:
Measuring
Use a test tube rack to hold test tubes
Use a test to clamp to move test tubes

12. Beaker & Erlenmeyer Flask
Use:
To hold large amounts of liquid
Mixing chemicals
Heating chemicals
Not Used
Measuring exact quantities of liquids
Drinking and eating out of

13. Graduated Cylinders Use Do not use
Measure precise liquids
Do not use
For mixing liquids
Determine the volume contained in a graduated cylinder by reading the bottom of the meniscus at eye level.
meniscus

14. Triple Beam Balance / Digital Scale
Use
To measure the mass of a solid
Will measure in grams
Do Not Use
For large objects

15. MICROSCOPES

16. Microscopy Microscopes – produce an enlarged image of an object
Used to study organisms, cells, and cell parts
Increase in apparent size is called magnification
The ability to show details clearly is called resolution
Microscopes vary in both magnification and resolution

17. Dissecting Microscope
Low Power
Cannot produce 3D images nor look through a specimen
Used to view living specimens mainly.

18. Compound Light Microscopes
Specimen mounted on a glass slide
Must be thinly sliced or very small
Pair of lenses
Ocular lens (eye piece)
Objective lens (nose piece)
Can be used to study LIVE specimens

19. Transmission Electron Microscope
Transmission EM (TEM)
Uses a beam of electrons to produce an enlarged image of very thinly sliced specimen on screen or photographic plate
Image focused by magnetic lenses
200,000X magnification
Cannot be used to view living specimens

20. Scanning Electron Microscope
Scanning EM (SEM)
3D image
Specimens not sliced for viewing
Surface sprayed with fine metal coating
Also uses electron beam and fluorescent screen or photographic plates
100,000X magnification
Cannot be used to view living specimens

21. Electron Microscopes
SEM
TEM

22. Exit Slip What is a hypothesis? What is a scientific theory?
What are the different types of microscopes?
What is the dress code for the lab?