National Science Olympiad Forum By SOF Olympiad Trainer - Page 525

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
sorry by mistake i have written B but the answer is C

Ans 2:

Class : Class 7
C , oil spill

Ans 3:

Class : Class 5

Ans 4:

Class : Class 6
Ans is C because due to oil spill fishes die because it happens in water. Also, aquatic birds get covered with black coating because of that they can't breathe and they die.

Ans 5:

Class : Class 6
answer is B because Oil spill is the condition when mineral oil or petroleum oil being carried on a ship gets spilled in the sea due to some reason. This causes death of aquatic organisms. Oil gets coated on feathers of aquatic birds making them unable to fly and to regulate their body temperatures. This causes death of the birds.

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 6
A

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
THE CORRECT ANSWER IS C, BECAUSE BLACK GOLD IS ANOTHER NAME FOR CRUDE OIL OR PETROLEUM .

Ans 2:

Class : Class 10

Ans 3:

Class : Class 8
I think it should be A as it says that option C is Black Gold is another name for granite, but Black Gold is another name for petroleum.

Ans 4:

Class : Class 4
black gold is another name for petroleum or crude oil but according to SOF it is granite I think there is some error in this question from SOF

Ans 5:

Class : Class 7
I prefer option C.

Ans 6:

Class : Class 5
How is this the answer ?

Ans 7:

Class : Class 6
Ans is C because Black Gold is another name for coal.

Ans 8:

Class : Class 1
Ans 6 is absolutely right. Ans is C.

Ans 9:

Class : Class 10
In my case, I feel that (A)is a suitable answer. But the correct option is (C). Why?

Ans 10:

Class : Class 7

Ans 11:

Class : Class 5
c is the correct answer

Ans 12:

Class : Class 8

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
tibia and fibula

Ans 2:

Class : Class 8
Tibia and Fibula(option C.)

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
Groundwater is safe for drinking but is not free of soluble impurities and that is why we boil it, so the correct option is (C)

Ans 2:

Class : Class 6
groundwater sometimes have heavy metals such as lead and arsenic dissolved in them and hence is always not safe for drinking

Ans 3:

Class : Class 7
tf

Ans 4:

Class : Class 8
Some dissolved salts in water is essential for human body and groundwater is free from suspended impurities but it contains soluble things, hence the option is C.

Ans 5:

Class : Class 7
Ground water is not always safe, it can contain soluble impurities like arsenic

Ans 6:

Class : Class 7

Ans 7:

Class : Class 8
Answer is option'D'. Neither of the statements are correct. And SOF World, Please listen to our comments and reply to it and rectify your mistakes quickly,ASAP. Iam not here to scold you, but trying to advise you. So please, from the heart of all the students who are commenting(including me), rectify all your mistakes ASAP( AS SOON AS POSSIBLE)!!!!!!!!!!!!

Ans 8:

Class : Class 9
Yes the option C is the correct as groundwater is not always safe

Ans 9:

Class : Class 3
Let’s check whether the given statements are correct or incorrect:Statement 1: Groundwater is safe for drinking. ----- Correct.Statement 2: Groundwater is free from soluble impurities. ----- Correct.Groundwater is water that accumulates underground. Groundwater is safe for drinking, because it is naturally filtered through layers of rocks and soil. So it is free from soluble impurities. That means Statement 1 is correct, and Statement 2 is the correct explanation of Statement 1.Hence, the right answer is Option A.

Ans 10:

Class : Class 9
No ground water has impurities, minerals, gases and some microbes dissolved in it

Ans 11:

Class : Class 3
Let’s check whether the given statements are correct or incorrect:Statement 1: Groundwater is safe for drinking. ----- Correct.Statement 2: Groundwater is free from soluble impurities. ----- Correct.Groundwater is water that accumulates underground. Groundwater is safe for drinking because it is naturally filtered through layers of rocks and soil. So it is free from soluble impurities. That means Statement 1 is correct, and Statement 2 is the correct explanation of Statement 1.Hence, the right answer is Option A.

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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
i got noooooooo idea

Ans 2:

Class : Class 4
Its C

Ans 3:

Class : Class 9
Adithi Keshava from National Center For Excellence , BangaloreClass : >Class 5 13 days agoOption C

Ans 4:

Class : Class 5

Ans 5:

Class : Class 9
Sunita from Dps, Greater NoidaClass : >Class 5 about a minute agoAdithi Keshava from National Center For Excellence , BangaloreClass : >Class 5 13 days agoOption CAns 2:Adithi Keshava from National Center For Excellence , BangaloreClass : >Class 5 13 days agoOption C

Ans 6:

Class : Class 7
I HAVE NOOOOOOOOOOOOOO IDEA !!!!!!!!

Ans 7:

Class : Class 5
Not C the answer is D

Ans 8:

Class : Class 7

Ans 9:

Class : Class 7
Option C

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Subject :NSO    Class : Class 5

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