Our Environment: Class 10 Science Q&A · Page 3
50 free answers on Our Environment (Science) for Class 10 students, across CBSE, ICSE and State boards.
Question & Answer
Questions
- ScienceClass 10CBSE
What will happen if we kill all the organisms at one trophic level?
If we kill all the organisms in one trophic level, the food supply to the next level will stop, resulting in an imbalance of the ecosystem. As a result, animals in the higher levels will die, making the growth of animals in the lower trophic level increase in an enormous way. All of this will affect the overall balance in the ecosystem.
- ScienceClass 10CBSE
Which of the following are environment-friendly practices? a. Carrying cloth bags to put purchases in while shopping b. Switching off unnecessary lights and fans c. Walking to school instead of getting your mother to drop you on her scooter d. All of the above
Solution: d) All of the above
- ScienceClass 10CBSE
Which of the following constitutes a food chain? a. Grass, wheat and mango b. Grass, goat and human c. Goat, cow and elephant d. Grass, fish and goat
Solution: Grass, goat and human Here, the grass is the producer, the goat is the primary consumer, and the human is the secondary consumer.
- ScienceClass 10CBSE
Which of the following groups contain only biodegradable items? a. Grass, flowers and leather b. Grass, wood and plastic c. Fruit peels, cake and lime juice d. Cake, wood and grass
Solution: a) Grass, flowers and leather c) Fruit peels, cake and lime juice d) Cake, wood and grass Above are the groups that contain only biodegradable items. Since plastic is not a biodegradable substance, that group cannot be considered biodegradable.
- ScienceClass 10CBSE
How can you help in reducing the problem of waste disposal? Give any two methods.
The following are the ways to reduce the problem of waste disposal: 3 Rs: By following the 3 Rs, one can reduce the problem of waste disposal. The 3 Rs are reduce, recycle and reuse. Reducing the usage of private vehicles and opting for public transport can reduce air pollution. Recycling and reusing plastics is also a way to reduce waste disposal. Preparation of compost: All biodegradable wastes, like kitchen waste, can be du
- ScienceClass 10CBSE
What is ozone, and how does it affect the ecosystem?
Ozone is a molecule formed by the three atoms of oxygen and is known as an isotope of oxygen. The main function of the ozone layer is to provide protection to the earth’s surface from the harmful UV rays of the sun. These rays are harmful to living organisms and may result in skin cancer.
- ScienceClass 10CBSE
Give any two ways in which non-biodegradable substances would affect the environment.
The following are the ways in which non-biodegradable substances would affect the environment: They cause air, soil and water pollution. They may cause bio-magnification in the food chain resulting in the end of humans.
- ScienceClass 10CBSE
Give any two ways in which biodegradable substances would affect the environment.
The following are the ways in which biodegradable substances would affect the environment: They keep the environment clean as they are easily decomposed. They can easily go through the geochemical cycle with the help of decomposers.
- ScienceClass 10CBSE
What are the trophic levels? Give an example of a food chain and state the different trophic levels in it.
In the food chain, the transfer of food or energy takes place at various levels, and these levels are known as trophic levels. Example: Grass → Goat → Man In the food chain, Grass represents the first trophic level. The goat represents the second trophic level. Man represents the third trophic level. <
- ScienceClass 10All
What is global warming?
Global warming refers to the long-term increase in Earth's average surface temperature due to human activities, primarily the emission of greenhouse gases into the atmosphere. These greenhouse gases, such as carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), trap heat from the sun within the Earth's atmosphere, leading to a gradual rise in global temperatures. This phenomenon is often associated with climate change, which encompasses various shifts in climate patterns and weather e