Chapter-15 Environmental Science — Online MCQ Test
SCIENCE · Samacheer Kalvi 9th · Tamil Nadu State Board
Practice Chapter-15 Environmental Science with a free chapter-wise online MCQ test.
This chapter covers: Description Explains pollution conservation biodiversity and sustainable development practices Keywords Pollution Conservation Sustainability Environment Biodiversity.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter-15 Environmental Science — Important Questions & Answers
Which of the following is a major cause of air pollution?
- A. Planting more trees
- B. Burning fossil fuels
- C. Rainwater harvesting
- D. Recycling paper
Answer: B. Burning fossil fuels
Burning fossil fuels releases harmful gases and smoke into the atmosphere. This is a major source of air pollution.
Burning fossil fuels releases harmful gases and smoke into the atmosphere. This is a major source of air pollution.
Biodiversity means the variety of ____ in a given area.
- A. rocks and minerals
- B. climate changes
- C. living organisms
- D. soil layers
Answer: C. living organisms
Biodiversity refers to the variety of plants, animals, and microorganisms in an ecosystem or region.
Biodiversity refers to the variety of plants, animals, and microorganisms in an ecosystem or region.
Which of the following best helps in reducing solid waste?
- A. Throwing all waste into one bin
- B. Burning plastic waste openly
- C. Segregating biodegradable and non-biodegradable waste
- D. Dumping waste in water bodies
Answer: C. Segregating biodegradable and non-biodegradable waste
Segregation helps in proper treatment and disposal of different types of waste. It also supports recycling and composting.
Segregation helps in proper treatment and disposal of different types of waste. It also supports recycling and composting.
Which of the following pairs is correctly matched?
- A. Reuse - using a plastic bottle once and throwing it away
- B. Recycle - converting waste into a new useful product
- C. Reduce - increasing the use of resources
- D. Conserve - wasting electricity
Answer: B. Recycle - converting waste into a new useful product
Recycling means processing waste materials to make new products. The other options do not match the correct environmental terms.
Recycling means processing waste materials to make new products. The other options do not match the correct environmental terms.
A student compares two practices: burning waste and composting kitchen waste. Which statement is correct?
- A. Both are equally eco-friendly
- B. Burning waste is better because it destroys all waste quickly
- C. Composting is better because it converts biodegradable waste into useful manure
- D. Composting increases air pollution
Answer: C. Composting is better because it converts biodegradable waste into useful manure
Composting is an eco-friendly method for biodegradable waste. It produces manure and reduces the burden on landfills.
Composting is an eco-friendly method for biodegradable waste. It produces manure and reduces the burden on landfills.