Grade 9 Science SNC 1D - Sustainable Ecosystems- Unit Review

Grade 9 Science SNC 1D - Sustainable Ecosystems- Unit Review

1)Define the following terms. You may need to look some

of them up in your text or online. Be specific:

2)What are the five essential needs a sustainable ecosystem provides for organisms living in the ecosystem?

3)Describe an example of a sustainable ecosystem. Include 3 strong details to support your example and be specific.

4)Describe an example of an ecosystem which is unsustainable. Include 3 strong details to support your example and be specific.

5)List and provide a description of each of the four spheres of the earth. How are the four spheres connected? Include a diagram to support your answer.

6)Describe four limiting factors that affect a population’s carrying capacity.

7)Describe the causes, process, and consequences of eutrophication.

8)Describe what is happening to lake Winnipeg.

9)Describe two ways humans can reduce eutrophication.

10)HUMAN IMPACT A: DEFORESTATION

a)Describe how this activity can effect each of the four spheres of the earth.

b)Desribe how this acitivity can make ecosystems unsustainable by impacting the five requirements for a sustainable ecosystem. Make sure you specify the type of ecosystem.

c)Describe two possible solutions to his human impact.

11)Draw the carbon cycle. On the carbon cycle, label the 6 important processes. For each, use a red arrow if it is a carbon source and a green arrow if it is a carbon sink.

12)Explain how carbon is stored in the carbon sinks. Why are carbon sinks important?

13)What are the two consequences of more carbon dioxide in the atmosphere?

14)Choose three of the six processes of the carbon cycle that humans are having the greatest impact on. For each describe how we are impacting it and what are the consequences on sustainable ecosystems. Make sure your answer reflects the learning done in class.

15)Explain the process of photosynthesis (include the chemical reaction in your explanation).

16)Explain the process of respiration (include the chemical reaction in your explanation).

17)How are photosynthesis and respiration related? Explain your answer fully.

18)a) Draw a food chain of an ecosystem that contains Northern cod, shrimp, seal, algae, and polar bears. How many trophic levels does it contain?

b) If the fish were over harvested and their population numbers crashed, describe how this human impact would affect two other species in the food chain

19)Explain why a sustainable ecosystem must be biodiverse.

20)Draw a pyramid of energy if in a field ecosystem there are clover plants, beetles, moles, and barn owls. Consider that the barn owl is made of 100 kJ of energy.

21)Describe the 10% rule. Include where the lost energy goes.

22)Why is a plant based diet for humans more sustainable for the planets’s ecosystems than a meat based diet? Explain with detail.

23)HUMAN IMPACT B: LARGE SCALE PRODUCTION OF MEAT

a)Describe how this activity can effect each of the four spheres of the earth.

b)Desribe how this acitivity can make ecosystems unsustainable by impacting the five requirements for a sustainable ecosystem. Make sure you specify the type of ecosystem.

c)Describe two possible solutions to his human impact.

24)HUMAN IMPACT C: PRODUCTION OF MODERN CONSUMER PRODUCTS (PLASTIC WATER BOTTLES AS AN EXAMPLE)

a)Describe how this activity can effect each of the four spheres of the earth.

b)Desribe how this acitivity can make ecosystems unsustainable by impacting the five requirements for a sustainable ecosystem. Make sure you specify the type of ecosystem.

c)Describe two possible solutions to his human impact.

25)HUMAN IMPACT D: INVASIVE SPECIES (Select two examples and answer the questions for each)

a)Describe how this activity can effect each of the four spheres of the earth.

b)Desribe how this acitivity can make ecosystems unsustainable by impacting the five requirements for a sustainable ecosystem. Make sure you specify the type of ecosystem.

c)Describe two possible solutions to his human impact.