Name:________________________________________Date:___________________________Period:_________

CCA Week 24 Test Review

1. Which food chain would go best with the ecosystem below:a. Fish → phytoplankton → whaleb. Whale → fish → phytoplanktonc. Phytoplankton →water fleas → mullet → fish → whale

2. True or False: the first organism in a food chain is always a producer. 3. Decomposers obtain their food by:

a. Killing prey for foodb. Producing food from oxygen c. Producing food from sunlightd. Breaking down dead organisms and absorbing the nutrients

4. Which of the following is NOT TRUE about the food chain?a. It shows the direction of energy flow in the ecosystem. b. It shows the amount of energy flow in the ecosystem. c. It shows the 3rd level of consumer.d. It shows the producer in the ecosystem.

5. If the owl eats the mouse that eats the insect, the owl is considered a:a. First-level consumerb. Second- level consumerc. Third-level consumerd. Decomposer

6. We get our energy from the food we eat. The primary source of energy in the food is:a. Light energy from the sunb. Fertilizer in the soilc. Heat from the sund. Growth hormones added to our food.

7. True or False: If an ecosystem with trees, shrubs and grasses had a disease that attacked only the shrubs, the other 2 organisms (trees and grasses) will be maintained in the ecosystem.

8. Cactus, rattlesnake and jackrabbit are all part of which biome?a. Grasslandb. Tropical Rainforestc. Desertd. Taiga

Use the food chain below to answer #’s 4-5:

9. True or False: Rain forests and deserts have differences in their abiotic factors. 10. Which ecosystem would most likely survive if a disease killed the grasses (circle one):

11. True or False: tropical regions have the greatest biodiversity because The climate is perfect for many different

species to grow and reproduce.12. Use the food chain on the right to answer the follow:

If there is an increase in the plants, what can you conclude:a. There will be an increase grasshoppersb. There will be a decrease in grasshoppers c. There will be a decrease in snakesd. There will be a decrease in hawks.

13. Use the word bank to answer the following definitions (not all will be used):

-A group of ecosystems with similar climates and organisms_______________________-The living and nonliving parts of an environment together make up a (n)___________________- Forest with mostly trees with leaves that change color in autumn and fall off during the winter_____________

-Desert

-Ecosystem

-Deciduous Forest

-Biome

Use the following food pyramid to answer #’s 14-15:

14. What would happen to the ecosystem if there is an increase in seals?a. There will be an increase in polar bearsb. There will be an increase in fish and penguins and a decrease in polar bearsc. There will be a decrease in fish and penguins and an increase in polar bears.

15. Which consumer(s) would receive the greatest amount of energy from the producers? ________________________________________________________________________

16. What will initially happen to the ecosystem if a disease strikes the seals? (Be specific)

__________________________________________________________________________

___________________________________________________________________________

17. Match the following yearly temperature graphs to the correct land biome (draw a line to the correct graph)

18.The graph to the right show two populations of lizards that live in two different areas of a desert region. Whichis NOT a true conclusion?

a. Lizards in Population A have a lower survival rate because the biodiversity is less.

b. Lizards survival is not dependent on

Grassland Desert Tundra

tree diversity in any part of the jungle.

c. Lizards in Population B live in a jungle area that have higher biodiversity and have a higher survival rate.

Use the following ecosystem to answer question # 19:

19. What will happen to the variety of wildlife in a forest if you cut down all the different trees and just plant one type of tree?

Remember the following:

Biodiversity is the diversity of life. The more biodiversity in an ecosystem the more sustainable that ecosystem becomes.

Sustainability o Could be defined as an ability or capacity of something to be maintained or to sustain itself. It's about

taking what we need to live now, without jeopardizing the potential for people in the future to meet their needs.

o If an activity is said to be sustainable, it should be able to continue forever. o A variety of organisms is one big factor that contributes to stability of a habitat.

Herbivores-eat only plants Carnivores-eat only animals Omnivores-eat both plants and animals Producers-Use the energy of the sun to make their own food through photosynthesis Decomposers-Break down dead animal and plant matter and return nutrients to the soil for the producers to use Scavengers-eat organisms that are already dead (they do not kill other organisms)

18. Name 3 producer-consumer relationship from above:

1. ___________&____________2. ___________&____________3. ___________&____________