⚖️ Balance and Biodiversity in Ecosystems
This quiz explores ecosystem balance and biodiversity—two core concepts in Ontario Grade 4 Biology. You'll discover how ecosystems maintain stable populations, why species diversity matters, and how the loss of even one species can ripple through food webs and threaten ecosystem health. **What you'll learn:** - How ecosystems achieve and maintain balance through interconnected relationships - Why biodiversity (species variety) is essential for a healthy ecosystem - How predator-prey cycles and nutrient cycling keep ecosystems stable - How food webs can collapse when a species disappears
Questions in this quiz
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- Question 1
What does ecosystem balance mean?
- Question 2
Biodiversity refers to the total amount of water in an ecosystem.
- Question 3
In a predator-prey cycle, what happens when the number of prey animals increases?
- Question 4
Which of these is an example of biodiversity in a forest ecosystem?
- Question 5
When one species disappears from a food web, it cannot affect any other species in the ecosystem.
- Question 6
What role do decomposers play in maintaining ecosystem balance?
- Question 7
If all the bees disappeared from a meadow ecosystem, which outcome would most likely happen?
- Question 8
Seasonal changes (like winter and spring) help maintain ecosystem balance by affecting when animals breed and plants grow.
- Question 9
Which statement best explains why high biodiversity makes an ecosystem more stable?
- Question 10
What is an example of nutrient cycling in an ecosystem?
- Question 11
A food web shows only one path of energy flow through an ecosystem.
- Question 12
Why is it important for an ecosystem to have both herbivores and carnivores?
- Question 13
If a stream ecosystem loses its top predator fish, what would most likely happen?
- Question 14
An ecosystem in perfect balance never changes and stays exactly the same forever.
- Question 15
Which action would most likely reduce biodiversity in a coral reef ecosystem?
- Question 16
How do plants help maintain ecosystem balance?
- Question 17
What happens to the predator population after the prey population crashes (becomes very small)?