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 - _________________