WORD DEFINITIONecosyst

empage 127

population

page 127

community

page 127

Nichepage 129

habitatpage 129

energy pyramidpage 146

cyclepage 149

Chapter 5, Lesson 1 – What is an ecosystem?

1. Name some living and nonliving parts of an ecosystem.

2. Why might an oak tree population decrease in a community?

3. How is an ecosystem similar to your body’s digestive system?

4. What is a biome?

5. Describe the niche of the spotted owl.

6. If no rain falls in a habitat for several years, how might the populations in the habitat remain balanced?

1. In the environment, organisms may _____________________ for _____________, _______________, _______________,__________________, or _________________.

2. What happens when an organism cannot compete?

3. ___________________ is a long-term relationship between different species.

4. How is symbiosis different from competition?

5. How does the cattle egret and the buffalo demonstrate symbiosis?

6. Why does it harm a parasite to have its host die?

Chapter 5 Lesson 6 What cycles occur in ecosystems?

1._______________ are organisms that eat wastes and dead matter.

2.A ____________ is a repeating process or a repeating flow of material through a system.

3._________________ break down the remains of dead organisms and waste products.

The Nitrogen Cycle4. _______of Earth’s atmosphere is nitrogen gas.5.How do herbivores get nitrogen?

Describe how nitrogen compounds cycle through soil bacteria, plants, herbivores, carnivores, and back to soil again.

a. __________________________________________________________________________________

b. ___________________________________________________________________________________________________________________________

c. __________________________________________________________________________________

The Carbon Dioxide-Oxygen Cycle

6. __________ of Earth’s atmosphere is oxygen gas.

7. _________ of Earth’s atmosphere is carbon dioxide gas.8.What are the three major sources of carbon dioxide?

9.What organisms provide oxygen for the atmosphere?

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Name_____________________________ Test Date________

Unit A: Life ScienceChapter 5: Interactions in Ecosystems

Mulitple Choice Questions:1. Trees like maple and spruce in a temperate rainforest community grow well

because of the ________________, _______________________ _____________________________.

2. The adaptation of _________________ ___________ best helps elk survive in the taiga biome.

3. Corals have a symbiotic relationship with plant-like algae that grow inside them. The algae benefit the coral by _____________________________________________________________________________________________________________________________________________________________________.

4. Creatures that live in the deep ocean need to adapt to the environmental factor of _________________ ___________________________.

5. The plant with the ______________________ _________________ _______________________ has a better chance of survival when competing for water, than the different kinds of plants in the same area.

6. Carnivores obtain energy by eating _________________________ ________________________________.

7. Decomposers make ______________________________ _____________________________________ that can be used by plants when they break down the remains of dead organisms.

8. The bird population will __________________________ in an ecosystem if someone spreads pesticide to control the insect population because the birds depend on the insects to survive.

9. The ______________________________ _________________________________ is home to more species than any other biome.

10. The ____________________________________________________________________________ is the source of much of the oxygen in our atmosphere.

11. __________________________________ have the greatest amount of energy in an ecosystem.

12. The role that decomposers play in an ecosystem is the ______________________________________________________________________________________________________________________________________.

13. A plant in the desert would most likely have a large root system that is ____________________ to the surface.

14. A _____________________ and a bacteria forming lichen both need each other to survive.

Short Response Questions:** Identify 3 nonliving parts of an ecosystem. (3 points)

1. ___________________2. ___________________3. ___________________

Part 2:Food Chain #1: ____________________________________________________________________________________________________________________________________________________________Food Chain #2:____________________________________________________________________________________________________________________________________________________________

**Part 1: Label each organism as a producer or consumer. Part 2: Identify 2 complete food chains. Example: Cactus, rabbit, coyote (3 points)

Part 1:

1. Cactus - _______________________2. Rabbit - _______________________3. Goat - _________________________4. Pigeon - _______________________5. Coyote - _______________________6. Bobcat - ________________________7. Snake - _________________________8. Road runner - _________________