June 25, 2013 Week 1 Day 2 LABORATORY EQUIPMENT AND TECHNIQUES
LAB TO LITERATURE 7th GRADE STUDENT CLASS NOTES
1. Meniscus
a. Definition b. How much liquid is in each graduated cylinder?
c.
A=______________________________ B=_____________________________ 2. Centrifuges need to be properly balanced. Given tubes with the following amounts of
liquid, balance the centrifuge below: a. 2 tubes with 5 ml, 2 tubes with 10 ml, 2 tubes with 15 ml mixture b. 1 tube with 5 ml, 2 tubes with 10 ml, 2 tubes with 15 ml
12 1
4
2 10
5
8
7
9
6
11
3
3. Following centrifugation, the supernatant is the _____________________________ portion while the precipitate (pellet) is the ___________________________________ portion (solid/liquid)
4. Magnification of a microscope. Definition: Fill in the table with the correct values
Eyepiece Objective Total Power
10X 4X
10X 10X
10X 400X
100X 1000X
5. Resolution
Definition Which has higher resolution
6. Put the following freezer temperaturs in order from which will store materials the longest to which will store materials the shortest: 4°C, -‐20°C, -‐80°C, -‐150°C (liquid nitrogen freezer)
1. 2. 3. 4.
7. How should microscopes be cleaned?
8. Place the following waste materials into to the correct disposal Broken glass beaker, scalpel blade, salt solution, agar plates containing bacterial colonies, paper towels used clean wipe bench top, methanol (toxic chemical)
9. From the scientific article displayed, identify the following: a. Name of the journal
b. Title of the article
c. Name of the first author
d. Where is the hypothesis found?
SHARPS