Skip to main content

Our Environment - Practice Set

Exam Preparation Quiz

Q1: Which biogeochemical cycle is most significantly disrupted by the combustion of fossil fuels?

  • (A) Carbon cycle
  • (B) Nitrogen cycle
  • (C) Water cycle
  • (D) Phosphorus cycle

✅ Correct Answer: Option A

Explanation: Burning fossil fuels releases large amounts of carbon dioxide, altering the natural balance of the carbon cycle. This leads to increased greenhouse gases in the atmosphere.

Topic: Carbon Cycle Disruption

Q2: What is the primary impact of eutrophication on aquatic ecosystems?

  • (A) Increased biodiversity
  • (B) Oxygen depletion
  • (C) Reduced algal growth
  • (D) Clearer water

✅ Correct Answer: Option B

Explanation: Excess nutrients cause algal blooms. When these algae die and decompose, bacteria consume large amounts of dissolved oxygen, harming aquatic life.

Topic: Eutrophication Impact

Q3: Bioaccumulation of persistent organic pollutants (POPs) is most pronounced at which trophic level?

  • (A) Producers
  • (B) Primary consumers
  • (C) Secondary consumers
  • (D) Apex predators

✅ Correct Answer: Option D

Explanation: POPs concentrate as they move up the food chain. Apex predators consume many organisms containing these pollutants, leading to the highest concentrations.

Topic: Biomagnification

Q4: Acid rain, primarily caused by sulfur dioxide and nitrogen oxides, significantly harms which aspect of the environment?

  • (A) Soil fertility and aquatic life
  • (B) Atmospheric pressure
  • (C) Ocean salinity
  • (D) Groundwater levels

✅ Correct Answer: Option A

Explanation: Acid rain lowers soil pH, releasing toxic metals and hindering plant growth. It also acidifies lakes and streams, killing fish and other aquatic organisms.

Topic: Acid Rain Effects

Q5: Which of the following best describes a positive feedback loop in climate change?

  • (A) Melting ice reduces Earth's reflectivity, increasing heat absorption.
  • (B) Increased CO2 absorption by oceans stabilizes temperatures.
  • (C) Volcanic eruptions cool the atmosphere.
  • (D) Deforestation increases carbon sequestration.

✅ Correct Answer: Option A

Explanation: As ice melts, darker surfaces absorb more solar radiation, leading to further warming and more ice melt. This amplifies the initial warming trend.

Topic: Climate Feedback Loops


Article Prepared By: Java Mitra

Content digitally curated via Poocho Na AI App

© 2026 JavaGuru Education

Comments

Post a Comment

Popular posts from this blog

Definitions as per CUET - PERFORMING ARTS - UNIT - II

I. Swara Roles in a Raga (राग में स्वरों के स्थान) Vadi (The King Note): English: The most important note of a Raga, used most frequently. It is often called the "King" of the Raga as it defines its character and mood. Hindi: राग में जिस स्वर का प्रयोग सबसे अधिक बार किया जाता है, उसे 'वादी' स्वर कहते हैं। इसे राग का 'राजा' भी कहा जाता है क्योंकि यह राग के स्वरूप को स्पष्ट करता है। Samvadi (The Minister Note): English: The second most important note in a Raga, which supports the Vadi. It is usually placed at an interval of 4 or 5 notes from the Vadi and is called the "Minister." Hindi: वादी के बाद राग में जिस स्वर का सबसे अधिक प्रयोग होता है, उसे 'संवादी' स्वर कहते हैं। इसे राग का 'मंत्री' माना जाता है जो वादी स्वर की सहायता करता है। Anuvadi (The Followers): English: These are the notes used in a Raga other than the Vadi and Samvadi. They are like "Companions" or "Servants" that help build the melodic structure...
Post a Comment
Read more

CUET - PERFORMING ARTS - UNIT - IV

I. Hindustani Classical Forms (उत्तर भारतीय शैलियाँ) Prabandh (प्रबंध): English: Prabandh was the dominant musical form before the advent of Dhrupad. The word literally means "well-bound." It consisted of various components called Angas (like Swara, Biruda, Padam, Tenaka, Patam, and Tala). It followed strict Sanskrit poetic rules and laid the foundation for modern Raga-based music. Hindi: ध्रुपद युग से पहले 'प्रबंध' गायन शैली का बोलबाला था। इसका शाब्दिक अर्थ है 'भली-भाँति बँधा हुआ'। इसके छह अंग (स्वर, विरुद्ध, पद, तेनक, पाट और ताल) होते थे। यह संस्कृत के कठिन काव्य नियमों पर आधारित था और इसी से आधुनिक संगीत का विकास हुआ। Dhrupad (ध्रुपद): English: One of the oldest and most grand forms of Hindustani music. It is characterized by its spiritual nature and absence of small ornaments (like Murki or Khatka). It is usually performed in four parts: Sthayi, Antara, Sanchari, and Abhog . Traditionally, it is accompanied by the Pakhawaj. Hindi: यह हिंदुस्तानी संगीत...
Post a Comment
Read more