Question: Is water biotic or abiotic? Explain why.
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Answer: Abiotic because it is not living.
Question: What is the first source of energy in most food chains?
Answer: The Sun.
Question: What gas do plants take in during photosynthesis?

Answer: Carbon dioxide (CO₂).

Question: Name one natural disturbance that affects ecosystems.
Answer: Wildfire, hurricane, flood, drought, earthquake, volcanic eruption.

What is one characteristic that all living things have?
They need energy, grow, reproduce, respond to their environment, or are made of cells.
Question: Name two biotic factors found in an ecosystem.

Answer: Examples: plants, animals, fungi, bacteria.
Question: What is a producer?
Answer: An organism that makes its own food through photosynthesis.
Question: Name one stage of the water cycle.

Answer: Evaporation, condensation, precipitation, or collection.
Question: Name one human activity that harms ecosystems.
Answer: Pollution, deforestation, overfishing, littering, habitat destruction.

Is a mushroom a producer, consumer, or decomposer?
Decomposer.
Question: Is the Sun biotic or abiotic? Why?
Answer: Abiotic because it is nonliving.
Question: If a snake eats a mouse, and the hawk eats the snake, who is the predator?
Answer: The hawk.

Question: During photosynthesis, plants use sunlight to make what?
Answer: Glucose (food) and oxygen.

Question: Why is pollution harmful to ecosystems?
Answer: It can kill organisms and damage habitats.
What gas do plants take in during photosynthesis?
Carbon dioxide.
Question: Give one example of how an abiotic factor can affect a living organism.
Answer: Water helps plants grow; sunlight allows photosynthesis; temperature affects survival.
Question: Why are food webs more realistic than food chains?

Answer: Because organisms usually eat more than one type of food.
Question: Why is photosynthesis important for animals?

Answer: It produces oxygen and food that animals depend on.
Question: How can humans help protect ecosystems?
Answer: Recycling, planting trees, reducing pollution, conserving water, protecting wildlife.
What would most likely happen to a hawk population if the number of mice decreased?
The hawk population may decrease because there would be less food.
Question: Explain why water is considered one of the most important abiotic factors.factors.
Answer: All living things need water to survive.
Question: What would most likely happen if all producers disappeared?

Answer: Most organisms would eventually die because the food chain would collapse.
Question: Explain the journey of one drop of water through the water cycle.
Answer: Example: evaporation → condensation → precipitation → collection.
Question: Explain how removing one species can affect an entire ecosystem.
Answer: It can disrupt the food web and affect many other organisms.
Explain how cutting down many trees could affect the water cycle and an ecosystem.
It reduces transpiration, destroys habitats, increases soil erosion, and can change rainfall and water availability.