1. What is the most dangerous thing in a science lab?
Tools and Procedures
Humans!
What is the most dangerous thing in a science lab?

2. Common Measurement System
Metric system – base 10 system
Length is measured in:
meters
centimeters
millimeters
How big is this pillbug?

3. How long are these snails?

4. Volume (liters, ml) -how much space something takes up
-usually a measure of liquids
- use a beaker or graduated cylinder

5. Mass - grams or kg

6. Temperature (celsius)

7. Class Activity - Data Collection
Measure your handspan.
What units will you use?
2. Measure your height in the same units.

8. Analyzing Data
- involves charts, graphs, models, images

9. Class Activity - Data Analysis
Create a data table that shows the height and handspan of everyone in your class (or row).
2. Make sure you have labeled it correctly.
3. Create a scatterplot graph of the data.

10. Microscopes
- Scanning Electron Microscope (3D image)

11. - Transmission Electron Microscope (flat)
*both SEM and TEM can only image dead specimens

12. Light Microscope

13. Cell Cultures
- single cell grown on nutrients will divide and form millions of cells

14. Cell Fractionation
- cells broken and parts are separated

15. Check for Understanding:
1. What tool would you use to measure volume? ______________________
2. What UNIT would the mass of a person be measured in? ____________________
3. What type of electron microscope takes very thin images? _______________ What type takes 3D images? ____________
5. What UNIT should you use to measure the length of a finger?