Chapter Exam

Chapter-11 Nature's Treasures — Online MCQ Test

Q: Which of the following is a renewable natural resource?

Answer: C. Forests — Forests are renewable resources as trees can be replanted and regrow, unlike non-renewable resources like coal and petroleum that take millions of years to form.

Q: Which resource is considered non-renewable?

Answer: C. Coal — Coal is a non-renewable resource because it takes millions of years to form from dead plants and animals, and once used, it cannot be replenished in human timescales.

Q: What happens when forests are cleared without replanting?

Answer: B. It leads to deforestation and habitat loss — Clearing forests without replanting causes deforestation, leading to loss of animal habitats, reduced oxygen production, and soil erosion.

SCIENCE · Grade 6 · CBSE(NCERT)

Practice Chapter-11 Nature's Treasures with a free chapter-wise online MCQ test for CBSE(NCERT) Grade 6 SCIENCE. This chapter covers: natural resources - conservation - environment. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter-11 Nature's Treasures — Important Questions & Answers (FAQ)

Frequently asked questions from CBSE(NCERT) Grade 6 SCIENCE — Chapter-11 Nature's Treasures, with answers and explanations. These are sample questions; the exam has its own separate question set.

What are natural resources?

A. Materials and energy sources found in nature that are useful to humans ✓
B. Only metals and minerals extracted from Earth
C. Artificial products made in factories
D. Resources created by human beings

Answer: A. Materials and energy sources found in nature that are useful to humans
Natural resources include all materials and energy sources found in nature that humans use, such as water, soil, forests, minerals, and fossil fuels.

Which of the following is a renewable natural resource?

A. Coal
B. Petroleum
C. Forests ✓
D. Natural gas

Answer: C. Forests
Forests are renewable resources as trees can be replanted and regrow, unlike non-renewable resources like coal and petroleum that take millions of years to form.

What is conservation?

A. Using resources without any limit
B. Protecting and preserving natural resources for future use ✓
C. Destroying forests to make space for buildings
D. Extracting all minerals from the Earth as quickly as possible

Answer: B. Protecting and preserving natural resources for future use
Conservation means protecting and preserving natural resources wisely so they are available for future generations and the environment remains healthy.

Which resource is considered non-renewable?

A. Water
B. Sunlight
C. Coal ✓
D. Oxygen

Answer: C. Coal
Coal is a non-renewable resource because it takes millions of years to form from dead plants and animals, and once used, it cannot be replenished in human timescales.

What happens when forests are cleared without replanting?

A. It increases oxygen production
B. It leads to deforestation and habitat loss ✓
C. It improves air quality
D. It increases biodiversity

Answer: B. It leads to deforestation and habitat loss
Clearing forests without replanting causes deforestation, leading to loss of animal habitats, reduced oxygen production, and soil erosion.

How does pollution affect natural resources?

A. It increases the quantity of resources
B. It makes resources contaminated and unsuitable for use ✓
C. It has no effect on resources
D. It creates new renewable resources

Answer: B. It makes resources contaminated and unsuitable for use
Pollution contaminates air, water, and soil, making natural resources unsuitable for human use and harmful to ecosystems and living organisms.

Compare renewable and non-renewable resources. Which statement is INCORRECT?

A. Renewable resources can be replenished naturally; non-renewable ones cannot
B. Non-renewable resources like coal take millions of years to form
C. Both renewable and non-renewable resources are equally abundant on Earth ✓
D. Renewable resources include forests and solar energy

Answer: C. Both renewable and non-renewable resources are equally abundant on Earth
Non-renewable resources like fossil fuels are limited and much less abundant than renewable resources. Treating them as equally abundant is incorrect.

A farmer observes that his soil fertility is decreasing despite annual harvest. Which combination of factors is most likely responsible?

A. Crop rotation alone can solve this completely
B. Only excessive irrigation causes this problem
C. Continuous monoculture farming, overuse of fertilizers, and lack of crop rotation deplete soil nutrients ✓
D. Rain is the only factor affecting soil fertility

Answer: C. Continuous monoculture farming, overuse of fertilizers, and lack of crop rotation deplete soil nutrients
Soil degradation results from multiple interacting factors: monoculture depletes specific nutrients, over-fertilization harms soil microbes, and lack of crop rotation prevents natural nutrient replenishment.

In comparing the long-term impacts, which statement about resource management is PARADOXICALLY true?

A. Aggressive extraction today ensures more resources tomorrow
B. Stricter conservation today may cost economically short-term but provides greater economic and environmental security long-term ✓
C. Resources need not be managed because they are infinite
D. Conservation prevents any economic development

Answer: B. Stricter conservation today may cost economically short-term but provides greater economic and environmental security long-term
While conservation requires initial investment and may limit short-term gains, it prevents resource collapse and ecosystem degradation, ensuring sustained prosperity and survival.

A student claims: 'Since we have renewable resources, we don't need to worry about conservation.' What is the critical flaw in this reasoning?

A. All resources are non-renewable
B. Renewable resources can still be depleted if consumed faster than they regenerate, and their regeneration capacity has limits ✓
C. Renewable resources are unlimited
D. Conservation is only for non-renewable resources

Answer: B. Renewable resources can still be depleted if consumed faster than they regenerate, and their regeneration capacity has limits
The statement ignores regeneration rates: forests, water, and soil can deplete rapidly if exploitation exceeds natural replenishment, making conservation essential even for renewable resources.

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