1. What is the most dangerous thing in a science lab?

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

3. How long are these snails?

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

7. - involves charts, graphs, models, images

8. - Scanning Electron Microscope (3D image)

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

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

12. - cells broken and parts are separated

13. 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?