water cycle – carbon cycle – nitrogen cycle – phosphorus...
TRANSCRIPT
Warm-up: Finish/Review Slides– Water cycle – Carbon cycle – Nitrogen cycle – Phosphorus cycle
• Be ready to teach your group about the cycle you researched, using your slideshow as a visual aid.
Biology 8/29 & 30• Present Material Cycles Slides • Review Homework • 2.2 Nutrition and Energy Flow • 2.2 Problem-Solving Lab
Homework Due Friday: • Chapter 2 Assessment
• Pages 62-63; #s 1-11, 15, 17-23
*CH. 2 QUIZ FRIDAY
Group Presentations• 2-3 minutes per presentation • You must take brief, concise notes if
you’re not presenting! • Feel free to “share” your presentations
with one another
Review: HomeworkPg 57 2.2
Energy Flow•Energy flows through Ecosystems from producers to consumers – Producers (make food) – Consumers (use food by eating producers or other consumers)
Autotrophs (Producers)•Sunlight is the main source of energy for most life on earth.
•Producers contain chlorophyll & can use energy directly from the sun
Heterotrophs (Consumers)Heterotrophs eat other organisms
to obtain energy. (e.g. animals) • Herbivores
– Eat Only Plants • Carnivores
– Eat Only Other Animals
• Omnivores (Humans) – Eat Plants & Animals
• Detritivores (Scavengers) – Feed On Dead Plant & Animal Remains (buzzards)
• Decomposers – Fungi & Bacteria
Heterotrophs (Consumers)
Comprehension Check• Give an example of an autotroph. • What is the difference between an
omnivore and a carnivore? • What is the main source of energy for all
life on earth?
Problem-Solving Lab 2.2
Turn to Pg. 50 in your book and complete the following in your Lab section of your binder
Solve the Problem Thinking Critically
Apply Concepts How can you organize trophic level information?
Warm-Up» Give an example of a carnivore » Give an example of an omnivore » Give an example of an herbivore » Define Food Chain » Define Food Web
Biology 8/31 & 9/1• Finish 2.2 Nutrition and Energy Flow • MiniLab 2.2
Homework Due Friday: • Chapter 2 Assessment
• Pages 62-63; #s 1-11, 15, 17-23
*CH. 2 QUIZ FRIDAY
• Food Chain – Simple Energy path through an ecosystem
• Food Web – More realistic and complex path through an ecosystem made of many food chains
Feeding Relationships
Energy flows through an ecosystem in one direction: from producers to various levels of consumers
Trophic LevelsEach Level In A Food Chain or Food Web is a
Trophic Level. • Producers
– Always The First Trophic Level – How Energy Enters The System
• Herbivores – Second Trophic Level
•Carnivores/Omnivores –Make Up The Remaining Trophic Levels
Each level depends on the one below it for energy.
Trophic Levels
Food Chain
Producer (trapped sunlight & stored food)
1st order Consumer
2nd Order Consumer
3rd Order consumer 4th Order
Consumer
Name the Producer, Consumers & Decomposers in this food chain:
21
Food Web
3 Ecological PyramidsEnergy Pyramid Biomass Pyramid
Pyramid of Numbers
Energy Pyramid
Biomass Pyramid
Pyramid of Numbers
Comprehension Check• What might a first order heterotroph typically
eat? • What is the difference between an food chain
and a food web? • Which ecological pyramid would best show the
amount of heat lost between trophic levels?
Page 54
Complete in Lab Tab of your binder
MiniLab 2.2
Observe and Infer Detecting Carbon Dioxide
Procedure #’s 1-3
Analysis #’s 1-3
Homework Due Friday: • Chapter 2 Assessment
• Pages 62-63; #s 1-11, 15, 17-23
*Ch. 2 Quiz Friday!
Reminder!!!
Exit TicketDiscuss with your table group how energy flows through ecosystems while materials cycle through ecosystems. Draw a diagram that illustrates these two different processes.
» Study for Ch. 2 Quiz (5-10 min.)
Biology Warm up: Friday
Biology 9/1• Ch. 2 Quiz • Introduction to Communities & Biomes
Homework Due Next Class: Read 3.1 & 3.2
» When you are finished with the quiz please read 3.1 and 3.2
» Quietly!