Question

Assertion: The Earth is a closed system for mineral cycle.

Reason: Mineral cycle takes place between abiotic and biotic components of earth.

• A. Both the assertion and reason are true and the reason is the correct explanation of the assertion
• B. Both the assertion and reason are true but the reason is not the correct explanation of the assertion
• C. Assertion is true but the reason is false
• D. Both the assertion and reason are false

Answer 1

The correct option is A Both the assertion and reason are true and the reason is the correct explanation of the assertion

We know that ecosystems are open systems where exchange of both the energy and matter takes place. If we consider our Earth, though there is an exchange of energy which is always present, but matter exchange is absent, it does not take place. This is the reason why our Earth is a closed system. The only way out is the mineral cycle that takes place by interaction between the abiotic and biotic components of the earth. Hence, both the assertion and reason are true and the reason is the correct explanation of the assertion.