Worksheet: Life on the Earth | Geography Class 11 - Humanities/Arts PDF Download

Fill in the Blanks 

Q1: What does the biosphere consist of?

Q2: Ecology is the study of the relationships between _______ and their environment.

Q3: Terrestrial ecosystems can be further classified into _______.

Q4: The primary source of energy for life processes on Earth is _______.

Q5: The structure of an ecosystem involves both _______ and _______ factors.

Q6: Producers in an ecosystem include _______ plants.

Q7: The first level of a grazing food chain starts with _______.

Q8: The carbon cycle is mainly the conversion of _______ into carbohydrates through photosynthesis.

Q9: Oxygen is the main by-product of _______.

Q10: Nitrogen is a major constituent of the _______ gases in the atmosphere.

Assertion and Reason Based

Q1: Assertion: Ecology is the study of the interactions of living organisms with their environment.
Reason: It focuses on how plants and animals live together as separate entities.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both 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) Assertion is false, but the reason is true.

Q2: Assertion: The carbon cycle involves the conversion of carbon dioxide through photosynthesis.
Reason: Carbohydrates produced by photosynthesis can only be used by plants.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both 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) Assertion is false, but the reason is true.

Q3: Assertion: The main source of energy for life on Earth is solar insolation.
Reason: Solar insolation is the energy generated during decomposition processes.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both 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) Assertion is false, but the reason is true.

Q4: Assertion: Biogeochemical cycles are largely energized by solar insolation.
Reason: In the sedimentary cycle, the main reservoir is the atmosphere and the ocean.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both 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) Assertion is false, but the reason is true.

Q5: Assertion: Ecological balance is maintained by competition between different species.
Reason: In vast grasslands, herbivorous animals are controlled by carnivorous animals.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both 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) Assertion is false, but the reason is true.

Very Short Answer Type Questions

Q1: Define ecology.

Q2: What are the two main components of an ecosystem?

Q3: Give an example of a terrestrial ecosystem.

Q4: What is the primary source of energy for life processes on Earth?

Q5: Name two abiotic factors in an ecosystem.

Q6: What is the main by-product of photosynthesis?

Q7: What is the primary source of free nitrogen in the atmosphere?

Q8: Which biogeochemical cycle is mainly based on atmospheric reservoirs?

Q9: Name one example of a sedimentary cycle.

Q10: What is ecological balance?

Short Answer Type Questions

Q1: Explain what an ecosystem consists of and why it is important.

Q2: Describe the key components of an ecosystem.

Q3: Explain the water cycle and its significance in sustaining life on Earth.

Q4: Describe the carbon cycle and its significance in ecological processes.

Q5: Explain the nitrogen cycle and its importance in ecosystems.

Q6: Explain the concept of ecological balance and how it is maintained in ecosystems.

Long Answer Type Questions

Q1: Describe the structure and functions of an ecosystem, highlighting the roles of abiotic and biotic factors.

Q2: Explain the importance of the water cycle in maintaining life on Earth, emphasizing its impact on ecosystems.

Q3: Describe the role of the carbon cycle in supporting life and influencing climate.

Q4: Explain the significance of ecological balance in maintaining the stability and health of ecosystems, providing examples where necessary.