National Science Olympiad Forum By SOF Olympiad Trainer - Page 525

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5
The third one is the correct answer

Ans 2:

Class : Class 4

Ans 3:

Class : Class 3
the third one is wrong

Ans 4:

Class : Class 8

Ans 5:

Class : Class 9
d

Ans 6:

Class : Class 5

Ans 7:

Class : Class 3
A

Ans 8:

Class : Class 5
A

Ans 9:

Class : Class 6
Answer should be option A

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5
everyone i;m a teacher

Ans 2:

Class : Class 4
how is gravitational force acting on the cup?

Ans 3:

Class : Class 3
B

Ans 4:

Class : Class 4
The answer is (B) as the book is under gravitational force that's why the book is on the table.

Ans 5:

Class : Class 4
(B)

Ans 6:

Class : Class 7
B is the answer bbbbbb. that'ss whyyy the book is o on tabblee.

Ans 7:

Class : Class 9
b is answer

Ans 8:

Class : Class 6
But no force is acting on the book

Ans 9:

Class : Class 5
nope i

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Subject :NSO    Class : Class 5

Ans 1:

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 2:

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

Ans 3:

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.

Ans 4:

Class : Class 7
C , oil spill

Ans 5:

Class : Class 5

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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 10

Ans 2:

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

Ans 3:

Class : Class 7
I prefer option C.

Ans 4:

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

Ans 5:

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 6:

Class : Class 5
c is the correct answer

Ans 7:

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 8:

Class : Class 7

Ans 9:

Class : Class 5
How is this the answer ?

Ans 10:

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

Ans 11:

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

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

Ans 2:

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 3:

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

Ans 4:

Class : Class 7

Ans 5:

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 6:

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

Ans 7:

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 8:

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 9:

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

Ans 10:

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 11:

Class : Class 7
tf

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Subject :NSO    Class : Class 2

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