Directions: Using the Succession Power Point, answer the following questions. 1. What did these events do to the earth? 2. How did the events do this?
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1 Name Period Date Assigned Date Due Date Returned Directions: Using the Succession Power Point, answer the following questions. 1. What did these events do to the earth? 2. How did the events do this? 3. What part of the earth was affected? 4. What differences were there between the two events? 5. Ecosystems try to maintain. Equilibrium is a state of. Major events can upset the equilibrium:,,,. 6. Succession is a series of predictable that occur in a community over time. 7. Succession allows and area to after a catastrophic event. 8. Succession begins with a species. 9. Once equilibrium is reached, it is called a community. 10. Climax communities are for each area. 1
2 PRIMARY SUCCESSION 11. Primary succession occurs on an area of newly exposed,,, or any area that has not been occupied by a living community. 12. Primary succession takes a very time. 13. Steps of primary succession a. species come in. Mosses and help to break down the rock to form soil. b. Plant come in on birds, animals, wind or water and begin to. c. Eventually, succession will lead to a community of organisms in. 14. Example of Primary Succession. Complete the chart with the correct description. STEPS OF PRIMARY SUCCESSION
3 Other examples of primary succession: 3
4 SECONDARY SUCCESSION 15. Secondary succession is a series of changes that occur after a disturbance to an ecosystem. 16. Occurs than primary succession because there is already. 17. Example of Primary Succession. Complete the chart with the correct description. STEPS OF SECONDARY SUCCESSION
5 21 Years after the lava from an erupting volcano destroyed an area, grasses started to grow in that area. The grasses were gradually replaced by shrubs, evergreen trees, and finally, by a forest that remained for several hundred years. The entire process is an example of - F feedback G ecological succession H plant preservation J deforestation 22 A volcanic eruption covers a wide area of forest with ash, lava, and volcanic rock. Which of these describes the first stage of ecological succession that will begin to return biotic factors to the forest community and return it to a state of equilibrium? A The volcano stops erupting. B The lava cools to form rock. C Lichens grow on the rocks. D The rock melts back into lava. 5
6 23 How does secondary succession help restore equilibrium to a region destroyed by a flood? F It increases the number and types of species. G It brings back species from extinction. H It stops other floods from occurring. J It decreases the rate of evolution. 24 The role of a pioneer species in primary succession is to change a bare habitat into one that is suitable for other organisms. A species that is responsible for primary succession in an ecosystem is MOST likely able to A survive any predator B migrate during the winter. C live at high altitudes. D carry out photosynthesis. 25 Which of the following sequence MOST likely represents ecological succession on a recently abandoned wheat field? F grasses flowering plants shrubs native trees G native trees shrubs flowering plants grasses H shrubs grasses native trees flowering plants J flowering plants native trees shrubs grasses 6
7 26 A flower bed is created at a school so flowers can be planted in the Fall. Over the summer it is uncared for. Which of the following could the students expect to find when they come back to school? A B C D 7
8 27 Lichens and moss are the first organisms to grow after a volcanic eruption. These organisms are known as - F secondary species G primary species H pioneer species J succession species 28 Why does secondary succession occur faster than primary succession? A Fewer changes must occur in secondary succession. B There are more pioneer species in secondary succession. C The environmental conditions are more extreme in primary succession. D There are more trophic levels in secondary succession In which of the above scenes will secondary succession most likely occur? F 1 only G 2 only H 3 only J 1 and 3 8
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