Slide 1 / 47 Slide 2 / 47 Ecosystem Dynamics Classwork & Homework www.njctl.org Slide 3 / 47 Classwork #1: Food Webs
Slide 4 / 47 Why is a food web useful? What 1 does it show? Slide 5 / 47 2 If animals cannot make their own food or create their own energy, where does their energy come from? Slide 6 / 47 3 What do you hypothesize would happen if the Sun was to stop shining in this area? What impact would it have on a food web?
Slide 7 / 47 Describe the difference between a primary 4 consumer and a secondary consumer. Slide 8 / 47 5 Correctly set up the following food web: a. Bears are secondary consumers of rabbits, deer and foxes b. Deer eat berries and leaves c. Rabbits eat berries and leaves d. Foxes eat rabbits Slide 9 / 47 Homework: Food Webs
Slide 10 / 47 6 What kind of food would an herbivore eat? Give an example. Slide 11 / 47 7 What kind of food would a carnivore eat? Give an example. Slide 12 / 47 8 What kind of food would an omnivore eat? Give an example.
Slide 13 / 47 9 What level of consumers are humans? Slide 14 / 47 10 Create a food web of your local area. Include at least 2 producers, 2 primary consumers and 2 secondary consumers. Slide 15 / 47 Classwork: Decomposers
Slide 16 / 47 11 Define decomposition. Slide 17 / 47 12 What are two organisms that help with decomposition? Slide 18 / 47 13 What effect does the growth of mushrooms have on the surrounding environment?
Slide 19 / 47 14 Why is composting a positive thing to do in your garden? Slide 20 / 47 15 List three factors that impact the rate of decomposition. Slide 21 / 47 Homework: Decomposers
Slide 22 / 47 16 What types of organisms are examples of fungi? Slide 23 / 47 17 Why is decomposition important for an ecosystem? Slide 24 / 47 18 How can you speed up the process of decomposition?
Slide 25 / 47 19 Bill is testing the effects of decomposition on two identical pieces of bread. One piece of bread is placed in an empty plastic bag. One is placed in a bag with water. One is placed in a bag with water and placed under a heat lamp. Which do you expect to rot the most? Why? Slide 26 / 47 Classwork: Cycles of Matter Slide 27 / 47 20 How do we define matter? Give two examples.
Slide 28 / 47 21 What are all living things primarily made up of? Slide 29 / 47 22 How does the matter that makes up plants make its way to a secondary consumer? Slide 30 / 47 23 What is responsible for recycling dead matter?
Slide 31 / 47 24 What role does the environment play in the cycle of matter? Give two examples. Slide 32 / 47 Homework: Cycles of Matter Slide 33 / 47 25 What is soil composed of?
Slide 34 / 47 26 How does the Law of the Conservation of Mass apply to a food web? Slide 35 / 47 27 What are the three main elements that make up the human body? Which substance makes up between 60%-75% of the human body? Slide 36 / 47 28 What would happen if matter was not returned to the soil?
Slide 37 / 47 29 Create a model that displays the movement of matter between plants, animals, decomposers and the environment. Slide 38 / 47 Classwork: Maintaining an Ecosystem Slide 39 / 47 30 What are the four basic needs of organisms?
Slide 40 / 47 31 Why are plants so important to an ecosystem? Slide 41 / 47 32 What negative effects does overpopulation have on an ecosystem? Slide 42 / 47 33 Why is the introduction of the cane toad in Australia having negative effects on the ecosystem? What efforts are being made to stop their spread?
Slide 43 / 47 Homework: Maintaining an Ecosystem Slide 44 / 47 34 Why are ecosystems considered fragile? Slide 45 / 47 35 How do organisms make sure that they maintain a proper population balance?
Slide 46 / 47 36 What negative effects does over-hunting have on an ecosystem? Slide 47 / 47 37 What is the difference between a native species and an alien species?
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