MCQ Questions for Class 10 Science Chapter 15 Our Environment
MCQ Questions for Class 10 Science Chapter 15 Our Environment are an effective way to test students’ knowledge and understanding of a subject. By forcing students to consider all the possible answers to a question, and then selecting the best answer, they are able to sharp their skills.
MCQ questions are a great way for students to learn and review basic concepts quickly. It can be beneficial in helping students retain more concepts and get a deeper understanding of various topics.
Chapter 15 Our Environment Class 10 Science MCQ Questions
1. Which of the following statement is incorrect?
(a) All green plants and blue green algae are producers.
(b) Green plants get their food from organic compounds.
(c) Producers prepare their own food from inorganic compounds.
(d) Plants convert solar energy into chemical energy.
▶ (b) Green plants get their food from organic compounds.
2. In an ecosystem, 10% of energy available for transfer from one trophic level to the net is in the form of
(a) Heat energy
(b) Light energy
(c) Chemical energy
(d) mechanical energy
▶ (c) Chemical energy
3. Identify the biotic factors of an ecosystem from the following
(a) Temperature, rain fall, soil
(b) Plants, animals and microorganisms
(c) Temperature, microbes and rainfall
(d) plants, animals and soil
▶ (b) Plants, animals and microorganisms
4. Which of the following constitute a food chain?
(a) Grass, wheat and mango
(b) Grass, goat and human
(c) Goat, cow and elephant
(d) Grass, fish and goat
▶ (b) Grass, goat and human
5. One organism may be the food for many organism will constitute the
(a) Food chain
(b) Food web
(c) food pyramid
(d) food trophic level
▶ (b) Food web
6. The limitation of number of trophic levels in a food chain is due to
(a) Sufficient food supply
(b) decrease in energy level at higher trophic level
(c) Increase in energy level at higher trophic level
(d) supply of water
▶ (b) decrease in energy level at higher trophic level
7. The decomposers in an ecosystem
(a) Convert solar energy in to chemical energy
(b) Produce their own food
(c) convert complex organic compounds into simple inorganic compounds
(d) Convert simple inorganic compounds into complex organic compound
▶ (c) convert complex organic compounds into simple inorganic compounds
8. What will happen if frog is missing in the food chain given below?
Grass → Grass hopper → Frog →Snake
(a) population of grass increases and grass hopper decreases
(b) Population of snake increases and grass hopper decreases
(c) Population of grass hopper increases and population of snake decreases
(d) population of grass hopper decreases and snake increases
▶ (c) Population of grass hopper increases and population of snake decreases
9. The existence of decomposers is essential in the biosphere because
(a) Replenishment of nutrients in the soil naturally
(b) Helps in removing the biodegradable wastes from the environment
(c) Helps in breaking complex organic matter into simpler inorganic matter
(d) All of these
▶ (d) All of these
10. Which of the following limits the number of trophic levels in a food chain
(a) decrease in energy at higher trophic levels
(b) Deficiency of food supply
(c) supply of chemicals
(d) availability of solar input
▶ (a) decrease in energy at higher trophic levels
11. The accumulation of chemicals at various trophic levels in a food chain is known as
(a) Chemical magnification
(b) Physical magnification
(c) Bio magnification
(d) Eutrophication
▶ (c) Bio magnification
12. Why do we see greater number of individuals at the lower trophic level?
(a) Because they are plant eaters
(b) because they are Producers
(c) because they are carnivores
(d) because they are decomposers
▶ (b) because they are Producers
13. Disposable plastic plates should not be used because:
(a) They are made of materials with light weight.
(b) They are made of toxic materials.
(c) They are made of biodegradable materials.
(d) They are made of non-biodegradable materials.
▶ (d) They are made of non-biodegradable materials.
14. Minimata a disease caused due to
(a) Land pollution
(b) Air pollution
(c) Bio magnification
(d) Water pollution
▶ (c) Bio magnification
15. Which of the following is terrestrial ecosystem?
(a) A natural forest
(b) A lake
(c) A pond
(d) An aquarium
▶ (a) A natural forest
16. By which way autotrophs convert energy of food?
(a) Solar energy to chemical energy
(c) solar energy to bio-gas
(b) Bio-gas to chemical energy
(d) Chemical energy to solar energy
▶ (a) Solar energy to chemical energy
17. Which of the following belong to same trophic level?
(a) Cockroach and spider
(b) Lizard and spider
(c) Hawk and spider
(d) Lizard and hawk
▶ (d) Lizard and hawk
18. Which of the following is an example of producers?
(a) Plastic pens
(b) Plastic cans
(c) Polythene
(d) Green plants
▶ (d) Green plants
19 Which of the following is a functional unit of environment?
(a) Ecosystem
(c) Carbon
(b) Nitrogen
(d) Oxygen
▶ (a) Ecosystem
20. An aquarium need to be cleaned frequently but a pond need not be cleaned
(a) because pond has decomposers in it so it will be cleaned naturally
(b) because there is a pond cleaner in it
(c) Because it is exposed sun light
(d) Because of rich iodine content
▶ (a) because pond has decomposers in it so it will be cleaned naturally
21. Which of the following constituents do not form ecosystem?
(a) Biotic constituents
(c) Abiotic constituents
(b) Plastic bags
(d) All of these
▶ (c) Abiotic constituents
22. Which of the following actions may not affect the environment in worse?
(a) Plastic bags buried inside the earth.
(b) Planting of trees
(c) Excessive use of non-biodegradable pesticides
(d) Burning of plastic bags
▶ (b) Planting of trees
23. Non-biodegradable wastes can be disposed by
(a) Decomposition
(b) throwing into water bodies
(c) buried under the soil
(d) Incineration
▶ (d) Incineration
24. The consequences of ozone depletion are
(a) Greenhouse effect and global warming
(b) Cataract and skin cancer
(c) Bio magnification and eutrophication
(d) acid rain fall and pollution
▶ (b) Cataract and skin cancer