1. Bell-ringer: 4 minutes
What types of organisms undergo the process of cellular respiration? a. Autotrophs b. Heterotrophs c. Plants d. All of the above

3. Feedback checks – parent letters
Detention warnings/ reminders
See me after school to retry larger quiz questions

4. Energy Flow Through an Ecosystem
Food Chains, Food Webs, Energy Pyramids, Prey Choice
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Begins with the SUN
Photosynthesis
6CO2 + 6H2O + sunlight & chlorophyll C6H12O6 + 6O2
Carbon dioxide + water + sunlight & chlorophyll glucose + oxygen
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Photosynthesis
Chemical reaction where green plants use carbon dioxide & water to store the sun’s energy in glucose
Glucose is stored as starch in plants
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Producers use most of the energy they make in cellular respiration for themselves.
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The energy that is not used by producers can be passed on to organisms that cannot make their own energy.
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Organisms (heterotrophs) that cannot make their own energy are called CONSUMERS.
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10. Consumers that eat producers to get energy:
Are first order (1st) or primary consumers
Are herbivores (plant-eaters)
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Most of the energy the primary consumer gets from the producer is used by the consumer.
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12. Some of the energy moves into the atmosphere as heat.
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Some energy in the primary consumer is STORED & not lost to the atmosphere or used by the consumer itself. This energy is available for another consumer (predator).
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14. A Consumer that Eats Another Consumer for Energy:
Is called a secondary or 2nd order consumer
May be a carnivore or a omnivore
May be a predator
May be a scavenger
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Most of the energy the secondary consumer gets from the primary consumer is used by the secondary consumer.
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Some of the energy is lost as heat, but some energy is stored and can be passed on to another consumer.
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17. A consumer that eats a consumer that already ate a consumer:
Is called a 3rd order or tertiary consumer
May be a carnivore or a omnivore
May be a predator
May be a scavenger
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Consumers that hunt & kill other consumers are called predators. The animals that are hunted & killed are called prey.
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The transfer of energy from the sun to producer to primary consumer then to higher order consumers can be shown in a FOOD CHAIN.
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20. Food Chains Show Available Energy
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21. More Food Chains… What tropic level?
TERTIARY CONSUMER
PRIMARY CONSUMERS
PRODUCERS
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Another way of showing the transfer of energy in an ecosystem is the ENERGY PYRAMID
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Energy Pyramids Show
Amount of available energy decreases for higher consumers
Amount of available energy decreases up the food chain
It takes a large number of producers to support a small number of primary consumers
It takes a large number of primary consumers to support a small number of secondary consumers
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25. How many individuals there are in each level?1 2 3 4 3
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26. What would happen if there were no…
TOP DIES
Cycle again!
INCREASE
INCREASE
DECREASE
INCREASE
INCREASE
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Food Webs:
Are interconnected food chains
They show the feeding relationships in an ecosystem
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28. How Many Chains are in this web? copyright cmassengale25
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29. Circle some Food Chains! copyright cmassengale

30. Test yourself What do the arrows indicate in a food chain?
How many trophic levels (levels of consumers/ producers) could there be?

31. Try your own
Create a food web that could be happening behind the school, in the bayou, in the river, or somewhere in the community (specify where). Include at least 1 producer, 2 primary consumers, and 1 top predator.

32. If time: Make our class a food web!
Rock Paper Scizzors with individuals who are a lower trophic level than you.
If you win, become the next higher individual
Grass (Arms up)
Insect (“Buzzing around”)
Bird (Wings flap)
Man (Show your muscles)
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What does this teach us?
More adaptations + Better decisions = Live longer
No replenishment of lower life = Starvation of predators
Producers may then be the most important or influential members of our food chains!
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34. Summary/ Feedback/ Questions
We need plants and fungi to recycle nutrients and compounds that we need (like oxygen and nitrogen!)
Consumers eat prey
Food chains show the order of feeding
Everything is connected
Only 10% of energy travels up the food chain each time!