Practice 1.2 Ecosystem Components: Biotic And Abiotic Factors (4.3.1.2) - Unit 4: Interconnectedness of Life: Ecosystems
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1.2 Ecosystem Components: Biotic and Abiotic Factors

Practice - 1.2 Ecosystem Components: Biotic and Abiotic Factors

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

Define biotic factors in your own words.

  • Answer: Biotic factors are the living (or once-living) parts of an ecosystem, such as plants, animals, and bacteria.
  • Hint: Think of anything that breathes, grows, or decays.

💡 Hint: Think of anything that breathes, grows, or decays.

Question 2 Easy

Identify which of the following are abiotic factors: Rocks, Fish, Sunlight, Grass, Temperature.

  • Answer: Rocks, Sunlight, and Temperature.
  • Hint: Look for the items that were never alive.

💡 Hint: Look for the items that were never alive.

7 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

Which of these is a physical abiotic factor?

  • Type: mcq
  • Options: A) Bacteria, B) Soil pH, C) Wind speed, D) Nitrogen levels
  • Correct Answer: C
  • Explanation: Wind speed is a physical force in the environment. Soil pH and Nitrogen levels are chemical factors, and bacteria are biotic.
  • Hint: Think of "weather" or "physical forces."
A) Bacteria
B) Soil pH
C) Wind speed
D) Nitrogen levels * **Correct Answer**: C * **Explanation**: Wind speed is a physical force in the environment. Soil pH and Nitrogen levels are chemical factors
and bacteria are biotic. * **Hint**: Think of "weather" or "physical forces."

💡 Hint: Think of "weather" or "physical forces."

Question 2

True or False: Biotic factors can influence and change abiotic factors.

  • Type: boolean
  • Options: True, False
  • Correct Answer: True
  • Explanation: Examples include plants increasing oxygen levels or roots breaking rocks into soil.
  • Hint: Look at the "Interplay" session in the summary.
True
False * **Correct Answer**: True * **Explanation**: Examples include plants increasing oxygen levels or roots breaking rocks into soil. * **Hint**: Look at the "Interplay" session in the summary.

💡 Hint: Look at the "Interplay" session in the summary.

2 more questions available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Impact Analysis: A construction project dumps large amounts of silt into a clear river. This makes the water cloudy, reducing the amount of light (abiotic) that reaches the riverbed.

  • Task: Describe the ripple effect on at least one biotic producer and one biotic consumer.
  • Solution: The lack of light prevents aquatic plants/algae (producers) from performing photosynthesis, causing them to die. This removes the food source and habitat for small fish or insects (consumers), causing their populations to drop as well.
  • Hint: Follow the energy from the sun to the eater.

💡 Hint: Follow the energy from the sun to the eater.

Challenge 2 Hard

Ecosystem Restoration: A scientist wants to restore a local pond. They decide to focus only on adding more fish (biotic). Explain why this plan might fail if they ignore the abiotic factors.

  • Solution: The plan might fail because if the water's oxygen levels are too low, the temperature is too high, or the pH is incorrect (all abiotic), the new fish will not survive regardless of how many are added. The environment must be able to support the life being introduced.
  • Hint: You can't put a "stage actor" on a "set" that is on fire!

💡 Hint: You can't put a "stage actor" on a "set" that is on fire!

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