Question 1 (a)
Five terms defined in at most 25 words each
5 marks
- Time to write
- About 10 minutes
Question
Question 1 (a) · 5 marksDefine each of these terms in at most 25 words (any five) (1×5=5)
- The hydrosphere (ii) Homeostasis (iii) A grassland
- Land degradation (v) Fossil fuels (vi) A pollutant
Reworded from the university paper; the task is the same. The original paper belongs to the University of Delhi. See DU's question bank.
Before you write
Read off the question and its marks
Read from the question
- any fiveAnswer any 5, 1 marks each. Only 5 are marked: a sixth earns nothing.
Write it in this order
The parts stand alone: start with the one you are surest of.
- Read; underline the asks; jot your points 1 min
- 1 (i) The hydrosphere 1 mark 2 min
- 2 (iii) A grassland 1 mark 2 min
- 3 (iv) Land degradation 1 mark 2 min
- 4 (v) Fossil fuels 1 mark 1 min
- 5 (vi) A pollutant 1 mark 1 min
- Check: every ask answered, key terms underlined 1 min
Easy marks
- Choose the ones you know best: each carries the same marks.
Short on time? A few lines on every part beat a full answer to one: each part is capped at its own marks.
Try it first. About 10 minutes for 5 marks. Write it out, then open the solution.
Solution
Hover or tap a marked figure, like 72,000, to see how it is made and where else it appears.
Any five of the six are answered; (ii) is left out.
(i) The hydrosphere: The water part of the environment, one of four components with the atmosphere, lithosphere and biosphere; it also stores gaseous nutrients.
(iii) A grassland: An ecosystem of grass cover where rainfall is low or soil poor; low rainfall limits trees and shrubs, but grass returns each monsoon.
(iv) Land degradation: Decline of land's productive quality through intensive farming, over-irrigation, chemical fertilisers and toxic wastes; deforested or overgrazed land finally becomes wasteland.
(v) Fossil fuels: Non-renewable hydrocarbon fuels, namely coal, oil and natural gas, formed from ancient prehistoric forests.
(vi) A pollutant: A substance or agent causing undesirable changes in our surroundings that harm plants, animals and human beings.
Where the 5 marks sit
| # | Component | Marks |
|---|---|---|
| 1 | (i) The hydrosphere | 1 |
| 2 | (iii) A grassland | 1 |
| 3 | (iv) Land degradation | 1 |
| 4 | (v) Fossil fuels | 1 |
| 5 | (vi) A pollutant | 1 |
| Total | 5 |
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