Question Paper
Class / Subject: Class 10 (CBSE) · Science
Chapter: Chapter 13 — Chapter 13: Our Environment
Time Allowed: 15 minutes
Max Marks: 6
1. Approximately what percentage of energy transfers between trophic levels? [1]
(A) 10%
(B) 50%
(C) 90%
(D) 100%
2. A food chain always begins with a: [1]
(A) producer
(B) decomposer
(C) top predator
(D) herbivore
3. The 10% law explains why food chains: [1]
(A) rarely extend beyond 4-5 levels
(B) can extend infinitely
(C) always have exactly 10 levels
(D) have no producers
4. The ozone layer protects Earth from: [1]
(A) harmful ultraviolet radiation
(B) visible light
(C) gravity
(D) magnetism
5. The international agreement that reduced ozone-depleting substances is the: [1]
(A) Montreal Protocol
(B) Paris Agreement
(C) Kyoto Protocol
(D) Geneva Convention
6. The 3 Rs of waste management are: [1]
(A) Reduce, Reuse, Recycle
(B) Read, Reuse, Repeat
(C) Reduce, Repair, Recycle
(D) Reuse, Repeat, Reduce