Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
The environment consists of two main components: Biotic (living) and Abiotic (non-living) components that are interdependent.
Biotic components include Producers (green plants), Consumers (animals), and Decomposers (bacteria and fungi).
Abiotic components include physical factors such as Sunlight, Air (, , and ), Water (), Soil, and Temperature.
Interdependence: Green plants are called autotrophs because they produce food using , , and sunlight through photosynthesis.
Animals are heterotrophs that depend on plants directly or indirectly for food and the Oxygen () needed for respiration.
Decomposers break down dead organic matter, returning vital nutrients and minerals like Nitrogen () and Phosphorus () back to the soil.
The balance of gases in the atmosphere is maintained by the cycle of and between plants and animals.
📐Formulae
💡Examples
Problem 1:
How do plants and animals help maintain the level of Oxygen () and Carbon Dioxide () in the atmosphere?
Solution:
Plants take in and release during photosynthesis. Animals take in and release during respiration.
Explanation:
This continuous exchange creates a cycle that ensures the concentrations of and remain relatively constant in the nature.
Problem 2:
What is the role of sunlight in the interaction between biotic and abiotic components?
Solution:
Sunlight is an abiotic factor that provides the energy required for producers (biotic) to synthesize glucose ().
Explanation:
Without the abiotic factor of solar energy, plants cannot produce food, which would eventually lead to the collapse of the biotic community (consumers).
Problem 3:
Why are decomposers essential for the survival of producers?
Solution:
Decomposers break down dead remains into simpler substances like nitrates () and other minerals.
Explanation:
These minerals are absorbed by the soil, making it fertile so that plants (producers) can grow and continue the life cycle.