Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
TUES 10/28 wk-3
OBJECTIVE: 
TOPIC –writing a lab report
DO NOW: -homeostasis
daily grade: WRAP UP: -LIST 3 limiting factors of vinegar eels
-organisms ablility
to maintain
constant internal
environment
DW: -LAB research/procedures
EXT: due: -
AGENDA:
-FAST PLANT DATA [day 27]
-LAB: vinegar eel pre-lab
HANDOUTS:
-LAB:VINEGAR EELS
COMPLETE / TURN IN:
BEFORE/AFTER SCHOOL:
-DW check
FAST PLANTS
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
RECORD OBSERVATIONS
-quantitative – data table
# plants [total]
# each color stem
# each color leaf
# true leaves/cotyledons on a
“typical” plant that represents ALL
measure height of plants
-qualitative – descriptions
PICTURE - drawn or photo
all & detailed of a “typical” plant
DESCRIBE - what plants look like
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
FastLAB:
PlantSCIENTIFIC
Ecology: Counting
1.3
METHODTrichomes
& BLOOD
TRICHOMES
TRICHOMES
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
Fast Plant Ecology: POLLINATING
perianth--nectar
Vinegar Eel LAB
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
The vinegar eel -- turbatrix aceti:
-harmless roundworm
-live in acidic oceans and lakes
-1 to 2 mm long
-points at both ends
-smooth, slender body is nearly transparent
-is possible to see its internal organs
-one of lowest animals to have digestive tract / complete
with mouth and anus
-made up of many cells, large enough to be seen with the
naked eye in bright light as it moves continuously in its vinegar
environment
Vinegar Eel LAB
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
-eels have muscles the whole length of their body and move
through the vinegar with powerful whip like motions
-females are larger than males
-females give live birth—about 45 every 8-10 days
-life cycle of a vinegar eel is about 10 months
COMPLETE PRE-LAB
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
COMPLETE pre-lab requirements
READ through LAB requirements FIRST!!
Use your lab write-up handout as a resource.
1-PRE-LAB PROCEDURES
-SCIENTIFIC METHOD components
-SELECT a variable to test
IDENTIFY:
1-independent/dependent variables
2-control
3-constants
4-experimental/control groups
COMPLETE PRE-LAB
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
2-PRE-LAB PROCEDURES
-RESEARCH info for variable [find 1-2 applicable info]
-COMPLETE procedures prior to LAB class period
-procedures should FLOW from one step to the next
-include important details
-instructor should be able to perform lab based on
information in the PROCEDURES
COMPLETE PRE-LAB
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
3-MATERIALS
-vinegar eels
-microscope
-well slides / spot plates
-droppers
-
PRE-LAB REVIEW
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
PROBLEM/QUESTION:
DV
IV
Does the ________
affect the ________?
HYPOTHESIS:
IV
If the ________
then the _________
DV
IV- ___________________
Pollutants
DV- ________________________
vinegar eel’s response
LAB GROUPS: (5 min)
COMPARE PRE-LAB information for group concesus
PEER REVIEW PRE-LAB PROCEDURES
PRE-LAB REVIEW
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
CONSTANTS:
amount pollutant, amount vinegar eel suspension, same eel
population, time observed, microscope/power, …
EXPERIMENTAL GROUP:
Eels w/pollutants A & B added
CONTROL GROUP:
Eels w/NO pollutant added
GATHER MATERIALS
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
-1 microscope slide with well per table partner
-1 microscope per table partner
-----------------------------------Turn the ocular lenses to low power (short lens)
-Raise the stage to its highest position
-Adjust the eyepiece so you can easily see
-PLUG IN / TURN ON MICROSCOPE
-----------------------------------
Collecting the vinegar eel
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
AT THE CART-1-Using a clean dropper provided at the front cart, carefully draw
up a very small amount of vinegar from the jar
-Place 2 drops of vinegar in the center of WELL A
3-Gently return any vinegar left in the dropper to the supply jar.
– Drop it close to the surface of the water
RETURN TO LAB STATION-4-Observe Eel (movement / focus)
-practice time with the microscope
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
Observing hints vinegar eels
-Instead of trying to follow the vinegar eels around the well, keep the
well in the same position and concentrate on focusing up and down as
individuals swim into view.
-If you are still having trouble, look at the edges of the well
-Share tips on how you focused/better view?
TIP: Try blocking some of the light with your hand
EEL DRAWING- PRELAB
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
-DRAW in circle and DESCRIBE (qualitative)
-Include comments on colors, size and how the creature moves.
-be DETAILED in drawing, include ENTIRE VIEWING AREA.
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
PRACTICE TIMING: vinegar eel
-Using dropper provided at the front cart, carefully draw up a
very small amount of CLEANER from the jar
-Place 2 drops of CLEANER in the center of WELL with eels
-OBSERVE EEL movement over several minutes—
do the EELS speed up or slow down
-RECORD time for EEL to COIL (if they coil)
CLEAN-UP
Microworlds Lesson Fourteen: Looking at Living Things: Vinegar Eels
1-Rinse off slide in sink with clean water
-place upside down on paper towel for drying
-do NOT rub with paper towels
2-turn off and replace microscope (back of station)
-wind up cord!!
3- WIPE down lab station