INTERACTIONS AMONG ORGANISMS

INTERACTIONS AMONG ORGANISMS

Symbiotic Strategies

http://www.teachersdomain.org/resource/nat08.living.eco.humeco.lpsymstra/

 Read “OVERVIEW” and answer the following questions:

1.     Write a sentence (using your own words) explaining the focus of this lesson.

2.     What are students suppose to “discover” in this lesson?

3.     Re-write the 6 objectives of this lesson (Use your own words)

You may now watch the videos and answer the questions after watching each video.

COLLAPSE OF SHARKS:

Watch this video and answer the following questions on a separate piece of paper

1.        Why are shark populations in danger of collapse?

2.        How has the relationship between sharks and humans changed over time?

3.      What might happen if the shark fin trade continues unchecked?

SHARK AND TURTLE:

Watch the video and answer the following questions

1.     How does the turtle protect itself?

2.     What relationship is held between the tiger shark and the loggerhead turtle?

SHARKS AND FISHERMAN

1.     How have sharks become trained to follow fishermen?

2.     Describe how the following species pairs interact in the video segment: fishermen/fish; sharks/fish; sharks/fishermen.

SHARKS IN OUR FUTURE

1.     Describe the type of tourism seen in this clip.

2.     What benefit do these businesses provide to: sharks? To local populations? To tourists?

3.     How might these businesses help prevent the collapse of shark populations?

UNLIKELY TRAVEL COMPANIONS

1.     List three ways in which being near a shark might be beneficial to a fish.

2.     What is one way that a shark might benefit from a fish (other than as prey)?

3.     Classify each shark-fish relationship shown in this video segment as commensalism, mutualism or parasitism.

Ecology

Ecology Webquest
Name: __________________________ Period: ________ Date: _____

Part I: Ecosystems and Nutrient Cycling
I. FOOD CHAINS
http://www.ecokids.ca/pub/eco_info/topics/frogs/chain_reaction/index.cfm
and click on “play the game” to begin. Answer the questions below:

1. A person is called a _____________________________________ because they eat meat and vegetables.
2. Food gives people and animals __________________________________.
3. ________________________ are animals that only eat meat.
4. ________________________ are animals that only eat plants.

(2) Choose the Forest Food Chain.
1. What animals were in your food chain? Place them in the correct order by creating a food link (show arrows representing the direction of energy).


2. What 5 things happen if you take the frog out of the food chain?
1. _________________________________________________
2. _________________________________________________
3. _________________________________________________
4. _________________________________________________
5. _________________________________________________
II. FOOD WEBS
(1) Go to http://www.harcourtschool.com/activity/food/food_menu.html Play the 3 food webs and answer the questions below
Name a consumer in your food web _______________________________
Name a producer in your food web ________________________________
Name a decomposer in your food web ______________________________
III. NUTRIENT CYCLING
A. Carbon Cycle
Go to http://www.windows.ucar.edu/tour/link=/earth/Water/co2_cycle.html
1. DRAW and label the carbon cycle on a separate paper AND fill in the blanks below:

• Plants pull carbon (in the form of carbon dioxide) from the atmosphere to make food, through a process called ____________________.
• Through food chains animals get ____________ from the plants and other animals they eat.
• When plants and animals die and _________________, carbon goes back into the ground.
• Some carbon is buried deep in the ground and forms ________________________.
• When humans burn fossil fuels, ________________ is released back into the atmosphere.
• When humans and animals exhale, they release carbon back into the air by a process called ______________________________.
B. Water Cyle
Go to http://www.windows2universe.org/earth/Water/water_cycle.html
1. DRAW and label the water cycle AND define the following vocabulary words
Transpiration, Condensation, Precipitation, Evaporation
B. Nitrogen Cycle
Go to  http://www.windows.ucar.edu/tour/link=/earth/Life/nitrogen_cycle.html&edu=mid 

DRAW and label the nitrogen cycle and answer the questions below

1. What are 2 ways nitrogen becomes useable to plants, humans and animals:
_________________________________________________________

_________________________________________________________

2. How do herbivores obtain the nitrogen they need?
_________________________________________________________

3. How is nitrogen returned to the atmosphere?
_________________________________________________________

4. What are two ways humans impact the nitrogen cycle:
1.________________________________________________________
2.________________________________________________________
5. What is the role of bacteria in the nitrogen cycle?
__________________________________________________________

IV. POPULATION
Go to http://www.geography4kids.com/files/land_population.html and answer the following questions:
1. What is a population? __________________________________________________________
__________________________________________________________

2. Two things that increase a population
a. ______________________________________________
b. ______________________________________________

3. Two things that decrease a population:
a. _____________________________________________
b. _____________________________________________



V. BIODIVERSITY
Go to http://www.nerc.ac.uk/research/issues/biodiversity/ and answer the following questions
1. What is biodiversity? ____________________________________________________________
___________________________________________________________
2. What is the estimated number of species existing on earth today______________
3. How many species have been named (a) and why may this number actually be too high (b)
a. _______________
b. ____________________________________________
4. What is a species?


5. What are the five main pressures on biodiversity
_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________



6. Describe three of the reasons that biodiversity is important
____________________________________________________________
_____________________________________________________________
___________________________________________________________