Hey there! Welcome to our fun blog post, where you’ll find multiple-choice questions (MCQs) about “Our Environment” for Class 10 Physics. It’s like a mini-quiz to test how much you know and learn cool new stuff!
“Our Environment” talks about everything around us, like air, water, plants, and animals, and how they all live together on our planet. We also learn how humans affect nature and why it’s important to take care of our world.
So, let’s jump into these questions and discover more about our environment. It’s a great way to see what you already know and to pick up new facts. Ready? Let’s go!
1. Which of the following is NOT a biotic component of the environment?
Answer:
Explanation:
Biotic components refer to living entities in the environment. Soil is an abiotic component.
2. The phenomenon where the earth’s surface temperature increases due to trapped greenhouse gases is called:
Answer:
Explanation:
Global warming is caused by the enhanced greenhouse effect, where certain gases trap heat within the earth’s atmosphere.
3. Which of the following is a non-biodegradable waste?
Answer:
Explanation:
Plastic bags do not decompose easily and are considered non-biodegradable.
4. Which layer of the atmosphere protects us from harmful ultraviolet rays?
Answer:
Explanation:
The ozone layer, which absorbs harmful ultraviolet rays, is located in the stratosphere.
5. The primary source of energy for our environment is:
Answer:
Explanation:
The Sun provides the primary energy that drives most of the processes in our environment.
6. Acid rain is caused by the emission of:
Answer:
Explanation:
When nitrogen oxides and sulfur dioxide mix with water vapor in the atmosphere, they form acidic compounds leading to acid rain.
7. Which of these is a renewable source of energy?
Answer:
Explanation:
Solar energy is derived from the Sun, making it renewable as it won’t run out in human timescales.
8. Deforestation leads to:
Answer:
Explanation:
By eliminating habitats, deforestation results in a decline in species diversity.
9. Ecosystems which are artificially created by humans are termed:
Answer:
Explanation:
Examples of man-made ecosystems include agricultural land, gardens, and urban areas.
10. The process by which water is continually circulated in nature is called:
Answer:
Explanation:
The water cycle involves processes like evaporation, condensation, and precipitation, ensuring continuous circulation of water.
11. A stable community of plants and animals reached after a series of changes is called:
Answer:
Explanation:
A climax community represents the final stage of ecological succession and remains stable until disrupted.
12. Biomagnification refers to the:
Answer:
Explanation:
As one moves up the food chain, the concentration of certain harmful substances can increase, leading to detrimental effects on top predators.
13. Which gas is primarily responsible for ozone layer depletion?
Answer:
Explanation:
CFCs released into the atmosphere can reach the ozone layer and lead to its depletion.
14. Which of the following is a cause of soil erosion?
Answer:
Explanation:
Deforestation removes trees which hold soil together, making it more prone to erosion.
15. The process of converting wasteland into a forest is called:
Answer:
Explanation:
Afforestation involves planting trees on land that hasn’t been forested for a long time, or ever.