Name of the Organisation : Delhi Public School, Noida
Name of the Exam : International Environment Olympiad
Document Type : Sample Question Paper
Category : Class VIII
Website : http://dpsnoida.in/session-information/international-environment-olympiad/
Download Question Paper : https://www.pdfquestion.in/uploads/22788-class-8.pdf
DPS Noida VIII Environment Olympiad Paper
The school is affiliated to CBSE and the CCE guidelines have been implemented from Class Nursery onwards with a Grading system reflecting Scholastic as well as Co-Scholastic areas in the Report Card. Project work and Oral testing emphasize the importance on self exploration and presentation skills.
Related : Delhi Public School Noida International Environment Olympiad Class VII Sample Question Paper : www.pdfquestion.in/22783.html
Examination Policy
** A strong academic curriculum is followed with emphasis on experiential learning through planned class activities, audio visual aids and Multiple Intelligence lesson plans, Modules on the Smart Boards supplement the teaching content in all classrooms from Nursery to XII.
Sample Paper
1. Plants use ………..gas for photosynthesis
a) Oxygen
b) Methane
c) Nitrogen
d) Carbon dioxide
2. Deforestation means
a) Preservation of forests
b) Destruction of forests
c) Monocrop cultivation
d) Agriculture
3. What percentage of its geographical area of a country should be under forest cover
a) 23%
b) 43%
c) 13%
d) 33%
4. About ………% of earth’s surface is covered by water
a) 53%
b) 19%
c) 71%
d) 90%
5. During photosynthesis, trees produce
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Carbon dioxide
6. Forest prevent soil erosion by binding soil particles in their
a) Stems
b) Roots
c) Leaves
d) Buds
7. Major causes of deforestation are
a) Shifting cultivation
b) Fuel requirements
c) Raw materials for industries
d) All of these
8. Blue baby syndrome (methaemoglobinemia) is caused by the contamination of water due to
a) Phosphates
b) Sulphur
c) Arsenic
d) Nitrates
9. Which of the following statements about forests is not correct?
a) Forest reduces soil erosion
b) Provides recreational opportunities
c) Provides a source of economic development
d) None of the above
10. India has largest share of which of the following
a) Manganese
b) Mica
c) Copper
d) Diamond
11. Out of the following nutrients in fertilizer, which one cause minimum water pollution?
a) Nitrogen
b) Phosphorous
c) Potassium
d) Organic matter
12. What is the permissible range of pH for drinking water as per Indian standards
a) 6 to9
b) 6.5 to 7.5
c) 6 to 8.5
d) 6.5 to 8.5
13. What is the maximum allowable concentration of fluorides in drinking water?
a) 1.0 milligram per litre
b) 1.25 milligram per litre
c) 1.50 milligram per litre
d) 1.75 milligram per litre
14. Excess fluorides in drinking water is likely to cause
a) Blue babies
b) Fluorosis
c) Taste and colour
d) Intestinal irritation
15. Which of the following is a non-point source of water pollution?
a) Factories
b) Sewage treatment plants
c) Urban and suburban lands
d) All of the above
16. The movement of carbon between __________ is called carbon cycle
a) Atmosphere & biosphere
b) Atmosphere & hydrosphere
c) Geo-sphere & Atmosphere
d) Biosphere, atmosphere, hydrosphere & geo-sphere
17. The depletion of trees is causing accumulation of
a) Nitrogen dioxide
b) Sulphur dioxide
c) Carbon dioxide
d) Oxygen
18. Earth’s atmosphere contains ___________ % of oxygen
a) 98%
b) 12%
c) C .21%
d) 78%
19. Plants can take up nitrogen in two forms
a) Ammonium and ammonia
b) Ammonia and nitrogen
c) Nitrate
d) Nitrogen
20. Conversion of ammonium to nitrate by chemical oxidation is termed as
a) Mineralisation
b) Leaching
c) Nitrification
d) De-nitrification
21. Nitrogen fixing bacteria exists in __________ of plants
a) Leaf
b) Roots
c) Stem
d) Flower
22. Sulphur occurs in soil and rocks in the form of ______
a) Oxides of Zn and Fe
b) Sulphates of Zn and Fe
c) Nitrates of Zn and Fe
d) Sulphides of Zn and Fe
23. Livestock waste release large amount of _____ into the environment
a) Ammonium
b) Ammonia
c) Nitrate
d) NO4
24. Conversion of nitrates into gases of nitrogen is called ________
a) Nitrification
b) Nitrogen fixing
c) Reduction
d) De-nitrification
25. Forest rich area in Karnataka is found in
a) Western ghats
b) Bandipur
c) Nagarhole
d) Mangalore
26. _________ are referred to as earth’s lungs
a) Forests
b) Carbon cycles
c) Water sources
d) Mines
27. Among the fresh water available in the earth, the percentage of surface water is about
a) 50%
b) 10%
c) 5%
d) Less than 1%
28. Important factor that causes water born disease is
a) Using contaminated sewage for irrigation
b) Leaching of untreated faecal and urinary discharges into water bodies
c) Discharge of industrial waste water
d) By eating contaminated food
29. Cholera and Typhoid are caused by
a) Worms
b) Virus
c) Bacteria
d) Fungus
30. Major source of fluoride is
a) River water
b) Toothpaste
c) Bacteria
d) Fungus