September 17, 2013
• Pre- AP• Correct Who’s Who?• Yeast Lab
Freshwater Food Web
September 17, 2013
• Periods 3 & 4• Make sure you have copied the Freshwater
Food Web into your journal.• Using the food web, complete the Who’s Who
sheet to turn in for a grade!!• Copy 4 Defintions• Game
September 17 2013
• Period 5• Copy the Organisms Graphic Organizer on the
Board• In groups of 3-4 organize the Freshwater
Organism cards into a food web.• In your journal draw the food web using arrows
and the names of the organisms only.• Complete the Who’s Who Sheet to turn in for a
grade!
September 17, 2013
• Period 7• Copy the Graphic Organizer on the Board• Study the Freshwater Food Web into your
journal.• Complete the Who’s Who? Sheet to turn in for
a grade.• Limiting Factors• If time permits: Limiting Factors Game
BIOTIC
• Living resources or components of an ecosystem
ABIOTIC
• Non –Living Resources or Components of an Ecosystem
Examples: Water, light, temperature, air, soil, rocks and wind
LIMITING FACTOR
• Those biotic and abiotic factors that limit the size of a population
COMPETITION
• All living things compete for– Food– Space
• Competition limits population growth
CARRYING CAPACITY
• The total number of organisms supported in a habitat
September 18, 2013 Pre-AP
• In your journal, write a short summary of how food, water and land (shelter) are important components of a habitat. Glue in the graph information.
• You will be assigned a number for a short game we will play.
• You will graph the data from the game.
September 18, 2013
• On your desk is a ½ piece of paper with some of the factors that were presented in the game played yesterday.
• Decide if the factor limited population growth or allowed population growth. (Did you have to go backward or forward?)
• Then decide if the factor was biotic or abiotic.• Check the correct boxes.
Limiting FactorYEAST LAB
• 10 cc Yeast• 10 cc Sugar• 50 mL Water at 40-50 degrees C• Spoon• Cup• Paper Towel
Procedure
1. One person will get supplies2. Set down paper towel on your desk. Place
the yellow cup on top.3. Observe the sugar, then pour into the cup.4. Observe the yeast, then pour into cup. Stir.5. Are there any changes?6. Pour the water into the cup and stir gently.7. Set the cup aside and wait.
YEAST
• Single Celled• Eukaryotic• Fungi• Used to expand in
cooking
ASEXUAL REPRODUCTION
• Parent Cell• Budding• Identical /
Uniform Offspring• No Survival
Advantage
ABIOTIC FACTORS
• Temperature• Space
POST LAB QUESTIONS – answer on handout
• 1. What kind of change occurred when mixing the sugar and yeast?
• 2. What abiotic factors affected the yeast?• 3. What kind of change occurred after adding water?• 4. Will the yeast continue to reproduce forever? Why
or Why Not?• 5. What is an example where two different species
might compete for resources?• 6. What did you learn about how yeast depends on and
may compete for abiotic resources?