MEDIUM
8th Foundation
IMPORTANT
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Important Questions on SOF National Science Olympiad

MEDIUM
8th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 8>Chapter 19 - SOF National Science Olympiad>SCIENCE>Q 33
Which of the following statements is/are incorrect?
I. Perspex is thermoplastic which is transparent like glass but is much stronger.
II. Nylon thread cannot support more weight as compared to steel wire of same dimensions.
III. Polyester and nylon on burning give smell of burning hair.
IV. Terylene, a synthetic fibre, can be used instead of wool.
MEDIUM
8th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 8>Chapter 19 - SOF National Science Olympiad>SCIENCE>Q 34

Given below is a list of few chemicals that are used for protection of crops
(i) Dalapon
(ii) Butachlor
(iii) Malathion
(iv) Simazine
(v) Disyston
(vi) Gammexane
How many of these are used as insecticides?                                                                 

MEDIUM
8th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 8>Chapter 19 - SOF National Science Olympiad>SCIENCE>Q 35

Refer to the given figures and select the incorrect statement regarding them.

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EASY
8th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 8>Chapter 19 - SOF National Science Olympiad>SCIENCE>Q 36

Following are the differences between manures and fertilisers.

Which of the given differences are incorrect?

  Manures Fertilisers
(i) They are not easily soluble in water. So they are not easily absorbed by the roots of the plants. They are soluble in water and are absorbed by the plants easily.
(ii) These are inorganic substances. These are organic substances.
(iii) Excessive use does not harm the soil texture, they provide humus to the soil. Excessive use can change the chemical composition of the soil and also pollutes water.
(iv) They restore the soil texture and help in water retention. They may damage the soil texture.
(v) These are nutrient specific. These are not nutrient specific.
MEDIUM
8th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 8>Chapter 19 - SOF National Science Olympiad>SCIENCE>Q 37
Identify the parts of the female reproductive system from the given statements and select the correct option.
P: It receives sperms.
Q: Here zygote develops into a baby.
R Ovum gets fertilized here.
S: It produces female gamete.
EASY
8th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 8>Chapter 19 - SOF National Science Olympiad>SCIENCE>Q 38

Refer to the given figure and select the incorrect statement regarding labelled parts W, X, Y and Z.

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EASY
8th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 8>Chapter 19 - SOF National Science Olympiad>SCIENCE>Q 39
Select the incorrect statement.
I. Sulphur dioxide gas combines with hemoglobin of blood and prevents transport of oxygen by it.
II. Methane, nitrous oxide and water vapor present in atmospheric air contribute to global warming.
III. Lead emitted by automobile exhaust could cause brain damage.
IV. Oxides of sulphur and nitrogen present in the air could affect lungs.
EASY
8th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 8>Chapter 19 - SOF National Science Olympiad>SCIENCE>Q 40

Identify P, Q, R and S in the given Venn diagram and select the incorrect option regarding them.

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