Tools and Procedures

What is the most dangerous thing in a science lab?

Common Measurement System

Metric system – base 10 system

How big is this pillbug?

Length is measured in:

meterscentimetersmillimeters

How long are these snails?

Volume (liters, ml)

-how much space something takes up-usually a measure of liquids- use a beaker or graduated cylinder

Mass - grams or kg

Temperature (celsius)

Analyzing Biological Data - involves charts, graphs, models, images

Microscopes

- Scanning Electron Microscope (3D image)

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

Light Microscope

Laboratory Techniques Cell Cultures- single cell grown on nutrients will divide and

form millions of cells

Cell Fractionation - cells broken and parts are separated

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?