RETAKE TICKETS FOR ENERGY IN ECOSYSTEMS UNIT
Before retaking you must be able to
1.
State the learning Target to Mr. Mork
2.
Complete the required “Ticket” to show preparation towards that target
ENERGY IN ECOSYSTEMS T1
1.
_____ I can State the learning Target to Mr. Mork
2.
_____ Get a copy of the retake test from Mr. Mork. Complete the test at home.
This is PRACTICE.
Bring this practice retake with you to use as evidence that you have prepared.
Best resources =
** play food web games online.
**Text pages 338-341
** Unit notes Notes available from Mr. Mork. Send an e-mail requesting a copy, or download from Mr. Morks website
ENERGY IN ECOSYSTEMS T2
1.
_____ I can State the learning Target to Mr. Mork
3.
_____ Get a copy of the retake test from Mr. Mork. Complete the test at home.
This is PRACTICE.
Bring this practice retake with you to use as evidence that you have prepared.
2.
Best resources = Your notes.
The lab notes from our class experiment in measuring calories.
There is an excellent video on youtube showing middle school students doing this lab
and using the equation to calculate calories. Here is the title:
( youtube 5 min video )

ENERGY IN ECOSYSTEMS T3
_____ I can State the learning Target to Mr. Mork
_____ pick-up the T3 RETAKE TICKET QUESTIONS. From Mr. Mork
Write excellent responses to those essay questions:
Best resources = Your notes.
Text pages 440-441 Energy pyramid
Class activity: Designing an acre of land to feed your family
Unit Notes packet from Mr. Mork
ENERGY IN ECOSYSTEMS T4
_____ I can State the learning Target to Mr. Mork
_____ Pick up the T4 RETAKE TICKET QUESTIONS from Mr. Mork
Write excellent responses to those questions.
Best resources:
Class notes. Text book. Youtube is full of good things on photosynthesis.
Cell respiration is a bit tougher. Use your textbook and our class notes.
Mr. Mork also has some typed notes for this unit. Get a hard-copy from Mr. Mork,
or download from his website

1.
Given an acre of land… How would you best use that acre to provide the most possible calories for your family? Explain why you chose the method which you chose.
2.
About what % of the energy in a fod chain is lost from the food chain at each step in that food chain? ______________
3.
Explain the shape of the energy pyramid… what pattern in nature does the pyramid represent.?
4.
In class.. we identified a better shape for the energy pyramid. We called it the birthday cake model of the energy pyramid. Make a 4 level pyramid using the birthday cake model… discuss why this model might better represent what happens in nature than the type of pyramid shown on Page 441 of your text.
5.
Explain why organisms which are closer to the sun in a food chain have more energy available to them than organisms which are further from the sun. Remember.. e are not talking about actual distance from the sun… like being on a mountain = closer to the sun  . We are talking about being closer to the sun in a food chain.

6.
You own a café called “Closer to the sun” your menu at the café is designed to encourage people to explore eating close to the sun. Write a short “Welcome” message which would be on your menu and would explain to your customers why you feel that eating closer to the sun in a food chain is a responsible thing to do. Then write-out 3 main course meals for your menu.
7.
In your opinion… should there be laws encouraging or even requiring people to eat closer to the sun.
State your position clearly. Then give at least 2 specific facts or concepts which support your position.
8.
In every ecosystem on the earths surface, the total weight of the producers is greater than the total weight of the herbivores. The total weight of the herbivores is greater than the total eight of the carnivores. Explain this pattern as though you were teaching someone else why this pattern has to be true. Be sure to use the idea of energy available at each step in the food chain as part of your answer.
9.
Why is there less energy available at each step in a food chain? Give specific examples which illustrate how energy is lost from a food chain.

RETAKE TICKET QUESTIONS Target 4
Compare and Contrast photosynthesis, and cellular respiration for each of the following items:
1.

Is energy stored in food, or released from food?
Photosynthesis
Cell respiration

Is sugar made, or broken down ?
Photosynthesis
Cell respiration

Is oxygen used from the environment , or released from the organism to the environment ?
Photosynthesis
Cell respiration

Is Carbon dioxide used from the environment , or released from the organism to the environment?
Photosynthesis
Cell respiration


How do the 2 chemical equations relate to each other ? Write each chemical equation and then use words to stat how they are related
Photosynthesis Equation
Cell respiration Equation
2.
Draw a leaf. Show details about a leaf which allow photosynthesis to occur. Explain how a leaf is designed to allow photosynthesis to occur
3.
Summarize the process of photosynthesis in the leaf of a maple tree.
Use the following terms in a way which shows that you understand the meaning of the words.
UNDERLINE each word as it is used in your essay.
STOMATA LEAF CELLS LEAF VEINS CHLOROPHYLL CHLOROPLASTS
CARBON DIOXIDE WATER OXYGEN GLUCOSE SUGAR
LIGHT ENERGY

Write an essay explaining the process of
Use the following terms in a way that shows that you understand their meaning.
UNDERLINE each term as it is used.
LIVING CELLS, GLUCOSE SUGAR, OXYGEN, CO2 and H2O,
ATP MOLECULES, ADP ENERGY ADP + P + energy from sugar = ATP

Practice question from actual test:
5. A hamster with a mass of 250 grams is placed in a sealed jar . The jar is air-tight. The hamster seems to do fine for a couple of hours. He nibbles food and is active. 2 hours later the hamster is dead. The veterinarian says that the hamster suffocated / died due to lack of oxygen and too much CO2 in the air.
Do you agree or disagree with the vet?
.
6.
A snake with the exact same mass as the hamster ( 250 grams ) is placed in an identical airtight jar. The snake lives for a few days while the hamster died in a few hours. Can you suggest a reason why the snake lived longer? Use the following ideas in your answer. Hint: in class we briefly discussed how warm blooded animals burn sugar much faster than cold blooded animals Hamsters are warm blooded. The snake is cold-blooded.
Cell Respiration . Cold Blooded / warm blooded. / Burns more sugar / Needs more energy
7.
A snail is placed in an airtight bottle with some water and several water plants. The snail is an herbivore.
He eats the plants and burns the sugar in his cells. A friend tells you that you should never put an animal in an airtight container because the animal will die from lack of Oxygen, as carbon dioxide levels build up in the sealed bottle.
Use the ideas you have learned about photosynthesis and cell respiration to construct an argument to support the idea that the snail can be expected to live a long time in this bottle.