Ecology Unit Post-assessment (Grade 8)

12 Questions | By Tagscience | Last updated: Mar 21, 2022 | Total Attempts: 67

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Ecology Unit Post-Assessment (Grade 8)

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1.

Aphids are small plant-eating insects that secrete sugary substances that attract ants. In exchange for receiving access to the aphids' sugary excretions, ants attack the predators and parasites of aphids. The relationship between ants and aphids is an example of what kind of symbiotic association? (Standards 6.1f, 6.1g, 6.3a)
- A.
  
  Predator/Prey
- B.
  
  Consumer/Decomposer
- C.
  
  Parasitism
- D.
  
  Mutualism
- E.
  
  Commensalism
2.

In the food web depicted below, which organism is the autotroph (Standards 1.1a, 1.1b, 1.1c, 6.1a)?
- A.
  
  Owl
- B.
  
  Hawk
- C.
  
  Tree
- D.
  
  Grasshopper
- E.
  
  Rabbit
3.

What important biotic factor is missing from the food web (Standards 1.1b, 1.1c, 6.1a, 6.1g)?
- A.
  
  Water
- B.
  
  Decomposers
- C.
  
  Producers
- D.
  
  Consumers
- E.
  
  Sunlight
4.

The process is best described as (Standards 6.3b, 6.3c):
- A.
  
  Ecological Succession
- B.
  
  An Energy Cycle
- C.
  
  Negative Feedback
- D.
  
  A Food Web
- E.
  
  Commensalism
5.

Which of the following organisms could fit in the space labeled x in this food chain? (Standards 1.1a, 1.1b, 1.1c) Grass → X → Snake → Puma
- A.
  
  Raptors or Eagles
- B.
  
  Mice
- C.
  
  Leaves
- D.
  
  Coyote
- E.
  
  Algae
6.

Coyote, wolves, and other carnivores occasionally kill chickens, pigs, and cows that live on farms, although they mostly eat small mammals that live in the wild. Farmers will frequently kill these predators to protect their livestock. Which result is most likely to occur when the predator population decreases (Standard 6.1d, 6.1e)?
- A.
  
  Herbivores will exceed carrying capacity and begin eating crops.
- B.
  
  The amount of healthy livestock on the farm will double in size.
- C.
  
  More grasses and seeds will be available for livestock to consume.
- D.
  
  Decomposers will take the place of predators in the ecosystem.
- E.
  
  The amount of parasites infecting the predators will increase.
7.

All life requires energy, carbon, oxygen, hydrogen, and nitrogen. Which statement best describes how they are used in the biosphere? (Standards 6.1a, 6.1b)
- A.
  
  Energy is recycled but elements must be added from the outside.
- B.
  
  Elements are recycled, but energy must be added from the outside.
- C.
  
  Both energy and elements are recycled.
- D.
  
  Neither energy nor elements are recycled
- E.
  
  The amount of elements and energy constantly increase
8.

The main source of energy for a wetlands ecosystem is (Standard 1.1b, 1.1e, 1.1f)
- A.
  
  Water
- B.
  
  Soil
- C.
  
  Plants
- D.
  
  Fish
- E.
  
  The Sun
9.

What are the two major life processes that involve carbon and oxygen (Standards 6.1d, 6.1e)?
- A.
  
  Coal formation and photosynthesis
- B.
  
  Photosynthesis and respiration
- C.
  
  Fuel combustion and open burning
- D.
  
  Death and decay
- E.
  
  Nitrogen fixation and denitrification
10.

Which term represents an indirect economic value of biodiversity?
- A.
  
  Food
- B.
  
  Clothing
- C.
  
  Flood Protection
- D.
  
  Medicines
- E.
  
  Fuel
11.

Rate, on a scale of 1 – 4, 1 being the lowest and 4 being the highest, how much do you know about ecology?
12.

Rate, on a scale of 1 – 4, 1 being the lowest and 4 being the highest, how interested you are in ecology?