IPS Name______

Chapter 3-4 Test

54 points

Directions: Choose the best answer for the following. (1 point each).

_____1. . A good representative of a food chain is______.

  1. producersconsumerconsumerproducer
  2. consumerdecomposerproducerconsumer
  3. producerconsumerconsumerdecomposer
  4. decomposerconsumerproducerconsumer

_____2. A pollutant found in the tissue of a fox is an example of_____.

  1. habitat destruction
  2. diversity
  3. stability
  4. biological magnification

_____3. All of the following are factors of hibernation except ______.

  1. slow breathing
  2. slow heart rate
  3. high energy requirements
  4. low body temperature

_____4. To be considered a species, two organisms must possess all of the following characteristics except ______.

  1. climate tolerance
  2. produce fertile offspring
  3. hibernation
  4. size of territory

_____5. A series of different organisms that transfer food and between the trophic layers is called a (n)_____.

  1. autotrophy
  2. heterotroph
  3. food chain
  4. food series

_____6. As energy is passed up the food chain, the energy_____.

  1. increases
  2. decreases

_____7. What is the percentage of energy lost in each trophic layer.

  1. 50%
  2. 67%
  3. 90%
  4. 70%

_____8. The energy for questions 6 and 7 are lost because of which of following?

  1. biological magnification
  2. breathing
  3. heart beat
  4. both b and c

_____9. Bacteria and fungi are examples of ______.

  1. producers
  2. herbivores
  3. omnivores
  4. decomposers

_____10. In the food chain, the primary consumer would be a(n) ______.

  1. herbivore
  2. decomposer
  3. producer
  4. fungi and bacteria

_____11. Plants produce their own food through the process of ______.

  1. hibernation
  2. photosynthesis
  3. biological magnification
  4. biodiversity

_____12. Condors are related to the vulture because they feed on carrion, or dead animals. The condors’ role in the food web would be a(n)______.

  1. producer
  2. scavenger
  3. decomposer
  4. herbivore

_____13. From where does autotrophs get their energy that produces their food?

  1. sun
  2. plants
  3. lower trophic level
  4. fungi

_____14. Plants take in ______and carbon dioxide during photosynthesis.

  1. oxygen
  2. sugar
  3. water
  4. hydrogen

_____15. Plants produce _____and oxygen during photosynthesis.

  1. oxygen
  2. sugar
  3. water
  4. hydrogen

_____16. A(n) ______is the same species living in a geographical area.

  1. species
  2. population
  3. community
  4. ecosystem

_____17. A(n)______is different populations living and interacting in the same area.

  1. species
  2. population
  3. community
  4. ecosystem

_____18. A food chain always begins with a (n)______.

  1. consumer
  2. producer
  3. decomposer
  4. scavenger

_____19. An organism that eats both plants and animals is a(n)______.

  1. decomposer
  2. herbivore
  3. omnivore
  4. producer

_____20. A(n)______is a network of food chains.

  1. food series
  2. biological magnification
  3. habitat destruction
  4. food web

____21. Another name for a heterotroph is a(n)_____.

  1. producer
  2. consumer

Use the following food chain to answer questions 23-25

Grass GrasshopperShrew Owl Bacteria

_____22. What animal would be considered the third consumer?

  1. grasshopper
  2. shrew
  3. owl
  4. bacteria

_____23. In the food chain above, if the population of shrews decreased, what would happen?

  1. population of owls would increase
  2. population of grasshoppers would decrease
  3. population of grasshoppers would increase
  4. shrew would start eating grass

_____24. If the population of owls increased, what would happen?

  1. shrews would increase
  2. shrews would decrease with an increase in grasshoppers
  3. population of shrews would remain the same
  4. none of the above

_____25. The role of the decomposers in the ecosystem is to ______.

  1. produce energy in lower trophic level
  2. return nutrients back to the soil
  3. eat producers
  4. none of the above

_____26. In an ecological pyramid, the base(bottom) has ______energy.

  1. the most
  2. the least

_____27. The total amount of organic matter present in a trophic level is called ______.

  1. biological magnification
  2. food web
  3. food chain
  4. biomass

_____28. The human body is made up of ______percentage of carbon.

  1. 95%
  2. 25%
  3. 18%
  4. 30%

_____29. The amount of carbon dioxide in the atmosphere is ______.

  1. 78%
  2. 95 %
  3. 0.10%
  4. 0.04%

In questions 30-38, answer with the following;

  1. Stores carbon
  2. Releases carbon into the atmosphere
  3. Takes carbon out of the atmosphere

_____30. Photosynthesis

_____31. Respiration

_____32. Decomposition of plants and animals

_____33. Burning fossil fuels

_____34. Plants create sugar

_____35. Limestone rock

_____36. Carbon dioxide dissolved in ocean water

_____37. Coal and oil under the ground

_____38. Erupting volcanoes

_____39. The molecule NH4 represents ______.

  1. carbon dioxide
  2. ammonium
  3. legumes
  4. nitrates

_____40. The ecological pyramid that has the units of kg is called the______

  1. biomass pyramid
  2. numbers pyramid
  3. energy pyramid

Match the following to the appropriate process in the nitrogen cycle.

_____41. nitrogen fixation: A. Changes atmospheric nitrogen to ammonia

_____42. denitrification:B. Nitrates are put into the structure of plants

_____43. ammonification:C. Occurs during decomposition

_____44. assimilation:D. Releases nitrogen back into atmosphere

_____45. nitrofication E. Change ammonia into nitrates

_____46. Phosphorus is important to humans because of the following except ______.

  1. Forms strong bones and teeth
  2. Builds amino acids and proteins
  3. Used to digest carbohydrates and proteins
  4. Use in genetic material and cell membranes

_____47. The greatest reservoir of phosphate in the phosphorus cycle is ______.

  1. Rocks
  2. Water
  3. Plants
  4. Animals

_____48. Humans are altering the phosphorus cycle because of ______.

  1. Pollution
  2. Loss of habitat
  3. Over use of fertilizers
  4. Use of pesticides

_____49. Plankton and fish are involved in the ______phase of the phosphorus cycle.

  1. Geochemical
  2. Ammoniafication
  3. Nitrogen fixation
  4. Ecological

Use the following information to calculate the numbers pyramid assuming the numbers in the ecosystem that needed to support the amount of wolves. (2 points each)

  1. 1 wolf can be supported in 100 square miles.
  2. Your total square miles are 400 square miles.

_____50. What is the total amount of wolves that can be supported in this area?

  1. 5 wolves
  2. 4 wolves
  3. 3 wolves
  4. 2 wolves
  1. Each wolf eats 1500 pounds of deer meat
  2. 1 deer weighs 150 pounds

_____51. How many pounds of deer meat does the total amount of wolves eat?

  1. 4000 lbs
  2. 6000 lbs
  3. 8000 lbs
  4. 10,000 lbs

_____52. What is the amount of deer that supports the wolves in the ecosystem?

  1. 12 deer
  2. 20 deer
  3. 40 deer
  4. 22 deer
  1. Each deer eats 1100 pounds of plants
  2. 5 pounds of plants =4 plants

_____53. What is the amount of plants that the deer eat?

  1. 44,000 lbs
  2. 55,000 lbs
  3. 66,000 lbs
  4. 75,000 lbs

_____54. How many plants support the deer?

  1. 23,200 plants
  2. 35,200 plants
  3. 39,500 plants
  4. 45,900 plants