Class 10 Science
Our Environment
Question 1:
The decomposers in an ecosystem:
(a) convert organic material to inorganic forms
(b) convert inorganic material to simpler forms
(c) convert inorganic material into organic compound
(d) do not break down organic compound
Question 2:
The amount of energy that flows from one trophic level to another in a food chain is
(a) 5%
(b) 10 %
(c) 20 %
(d) 15 %
Question 3:
The manufacturing of Chlorofluorocarbons free refrigerators is mandatory throughout the world. How does this help prevent ozone depletion?
(a) This will help convert oxygen molecules into ozone.
(b) This will help convert the CFCs into ozone molecules.
(c) This will reduce the production of CFC from oxygen molecules.
(d) This will reduce the release of CFCs that reacts with ozone molecules
Question 4:
The driving force of any ecosystem is
(a) carbohydrates
(b) solar energy
(c) biomass
(d) ATP
Question 5:
What is the order of the waste management hierarchy, from most to least favoured?
(a) Prevention-Recycle- Reuse- Disposal
(b) Prevention-Reuse-Disposal-recycle
(c) Prevention-Disposal – Reuse- Recycle
(d) Prevention-Reuse-Recycle-Disposal
Question 6:
The biotic components of an ecosystem consist of
(a) plants & animals
(b) algae & fungi
(c) producers, consumers & decomposers
(d) air, water & soil
Question 7:
Which of the following constitutes a food chain?
(a) Grass, Goat & human
(b) Goat, crow and elephant
(c) Grass, fish & zebra
(d) Grass, wheat & apple
Question 8:
The harmful chemical which is accumulating in human beings through food chain is
(a) BHC
(b) DDT
(c) CFC
(d) None
Question 9:
What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
Question 10:
Which disease is caused in human beings due to depletion of ozone layer in the atmosphere?
Question 11:
Why are bacteria and fungi called decomposers? List any two advantages of decomposers to the environment.
Question 12:
What is ozone and how does it affect any ecosystem?
Question 13:
What are biodegradable and non- biodegradable substances? Select two biodegradable pollutants from the following: Agricultural waste, glass, plastic, sewage, DDT.
Question 14:
What will happen if we kill all the organisms in one trophic level?
Question 15:
What will be the amount of energy available to the organisms of the 2nd trophic level of a food chain, if the energy available at the first trophic level is 10,000 joules?
Question 16:
What is incineration?
Question 17:
Why are the crop fields is known as artificial ecosystem?
Question 18:
Give any two ways in which biodegradable substances would affect the environment.
Question 19:
In a lake contaminated with pesticides, which one of the following organisms living in the lake will contain the maximum amount of pesticide?
Small fish, zooplankton, big fish, phytoplankton.
Question 20:
How can you help in reducing the problem of waste disposal? Give any two methods.
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In summary, problem-solving after learning a theoretical concept on CBSE Our Environment Class 10 Science is an essential part of the learning process. It enhances your understanding, critical thinking abilities, and retention of knowledge. Moreover, it equips you with valuable skills that are applicable in academic, personal, and professional contexts.
You must have heard of the phrase “Practice makes a man perfect”. Well, not just a man, practice indeed enhances perfection of every individual.
Practicing questions plays a pivotal role in achieving excellence in exams. Just as the adage goes, "Practice makes perfect," dedicating time to solve a diverse range of exam-related questions yields manifold benefits. Firstly, practicing questions allows students to familiarize themselves with the exam format and types of problems they might encounter. This familiarity instills confidence, reducing anxiety and improving performance on the actual exam day. Secondly, continuous practice sharpens problem-solving skills and enhances critical thinking, enabling students to approach complex problems with clarity and efficiency. Thirdly, it aids in identifying weak areas, allowing students to focus their efforts on improving specific topics. Moreover, practice aids in memory retention, as active engagement with the material reinforces learning. Regular practice also hones time management skills, ensuring that students can allocate appropriate time to each question during the exam. Overall, practicing questions not only boosts exam performance but also instills a deeper understanding of the subject matter, fostering a holistic and effective learning experience.
All About Daily Practice Problems on Class 10 Science Our Environment NCERT Chapter 13
Our Daily Practice Problems (DPPs) offer a diverse range of question types, including Multiple Choice Questions (MCQs) as well as short and long answer types. These questions are categorized into Easy, Moderate, and Difficult levels, allowing students to gradually progress and challenge themselves accordingly. Additionally, comprehensive solutions are provided for each question, available for download in PDF format - Download pdf solutions as well as Download pdf Questions. This approach fosters a holistic learning experience, catering to different learning styles, promoting self-assessment, and improving problem-solving skills. With our well-structured DPPs, students can excel in exams while gaining a deeper understanding of the subject matter. Hope you found the content on Class 10 Science Our Environment NCERT Chapter 13 useful.
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