Science (6)
FYI - starting Thursday (no earlier than 6 a.m.) you can email Larry your choice of a marine bird or marine mammal. Send the:
common name, phylum. class, order, family. genus and species
HW due Friday, May 10th:
write Q's and A's for #'s 1-24 on pp. 82-83
HW due Wednesday, May 8th:
read pp. 60-77 in Animal book
write Q's and A's on lined paper for the following Section Reviews:
pg. 62 - #1,2
pg. 67 - #1,2,3
pg. 72 - #1,2,3,4
pg. 77- #1,2
Here's a link to NPR's Fresh Air interview with Mary Roach about the digestive system, in all it's glory:
http://www.npr.org/player/v2/mediaPlayer.html?action=1&t=1&islist=false&id=175381702&m=175918987
For the day's notes, see photos at the bottom of the page
For your draft Bacteria and Mold Lab, add the following:
Discussion - As shown on pg. 15, the agar plates exposed to swab samples from the water in a fish tank (sample #4), a lizard's back (sample #5), and a dead owl's talons (#6) had the most colonies growing after incubation of 2 weeks at room temperature. The sample collected from the water in the mudskipper's tank (#4) had the most bacterial colonies of mold and bacteria combined than any other sample. Sample #6 had the most area covered by a colony of unidentified life (bacteria? mold? yeast?). Sample #8, collected from the handle of the boy's toilet, was populated with approximately twice as much mold as bacteria (covering about 60% of the agar plate area). The girl's toilet handle sample (#3), in comparison, had 20% of the agar covered with bacteria and mold, with the mold covering about six times as much area as bacteria. Samples # 9, 2 and 1 had much fewer bacteria and mold colonies, as shown on pg. 15. Sample #7, collected from the outside handle of the M.S., had approximately the same number of mold and bacteria as sample #10, which had been exposed briefly only to a clean swab and air, as a control for comparison.
Bacteria Swab Sites – Match the site to the plate… which is the cleanest? See photos below.
- Bert the lizard’s scaly back
- Boy’s toilet handle
- Control (clean swab streaked on sterile plate)
- Girl’s toilet handle
- Laptop keyboard
- Math meter stick
- Outside door handle of Treasure Island
- Skippy’s tank water
- Talons (claws) of the dead Barred owl
- Water fountain handle
sturgeon, mouth closed
sturgeon, mouth open
HW Quiz 3 scores, Protists & Fungi
