National Science Olympiad Forum By SOF Olympiad Trainer

User Forum

Subject :NSO    Class : Class 7

A person put warm water in an aquarium, thinking that the fish would be more comfortable in it. However, the fish died. What can be the reason for this?

A The concentration of oxygen decreases in warm water.
B The concentration of carbon dioxide increases in warm water.
C Fish cannot bear the extreme heat of the water.
D All of these


Won’t there be an increase of CO 2 if the oxygen level goes down and the fishes respire?!??!

Ans 1:

Class : Class 8
Yes, but the concentration of oxygen does not decrease in warm water. The fish will die because they cannot bear the extreme heat.

Ans 2:

Class : Class 7

Ans 3:

Class : Class 7
Yes the concentration of oxygen decreases and the fish cannot bear the heat. I think options are wrong. It should be both B and C

Ans 4:

Class : Class 7
The concentration of oxygen decreases in warm water as the solubility of gases in water decreases as the temperature increases.

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 6
how?

Ans 2:

Class : Class 5

Post Your Answer

Subject :NSO    Class : Class 2

Complete the following paragraph by selecting the correct sequence of words. ____ rotates from ______ to _____ on its own _______. Its rotation causes day and night. It also revolves around the _____ on fixed path called _____.

A Earth, West, East, Axis, Sun, Orbit
B Sun, East, West, Orbit, Earth, Axis
C Earth, East, West, Orbit, Sun, Axis
D Earth, East, West, Axis, Sun, Orbit


The Earth rotates from East to West and not West to east. Please clarify if my understanding is not correct

Ans 1:

Class : Class 3
Can you please help me understand this question before this Tuesday.

Ans 2:

Class : Class 2
Hbbbbbbhj job by fhhbfyhjhhjvug by f guy try hghvgghghvhggfhvhvhfyggvgc number bhgughfhf gf cc ft fyfhgyguguhuhjiihjhhjhjhjhhjjhjhjhihiuihjhihihihihihihiihihihihihkhihihjhuiuihihhjjjjjhjj

Ans 3:

Class : Class 2

Post Your Answer

Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
need more explanation plesase.

Ans 2:

Class : Class 8
Can someone explain this a bit more in detail?I did not understand the solution given.

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
i thought it was B

Ans 2:

Class : Class 6
most likely either A or B .

Ans 3:

Class : Class 7
A is the correct answer

Ans 4:

Class : Class 6
please can anyone explain

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
the answer is b

Ans 2:

Class : Class 6
I think it's answer is B option.

Ans 3:

Class : Class 7

Ans 4:

Class : Class 7
C is correct answer because C is daughter of A

Ans 5:

Class : Class 8
correct answer is c

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 4
Option A- Seeds of plant X are dispersed by explosion

Ans 2:

Class : Class 6
Ans is C because animals go for a less distance and they take the seed and they take out the seed at that place where they reached.

Post Your Answer

Subject :NSO    Class : Class 7

Post Your Answer

Subject :NSO    Class : Class 7

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
Heatstroke is a condition caused by your body overheating, usually as a result of prolonged exposure to or physical exertion in high temperatures. This most serious form of heat injury, heatstroke, can occur if your body temperature rises to 104 F (40 C) or higher. The condition is most common in the summer months.Heatstroke requires emergency treatment. Untreated heatstroke can quickly damage your brain, heart, kidneys and muscles. The damage worsens the longer treatment is delayed, increasing your risk of serious complications or death.

Ans 2:

Class : Class 3

Ans 3:

Class : Class 6
faltu and the most boring question in the world

Ans 4:

Class : Class 3
good question

Ans 5:

Class : Class 5
good one though

Ans 6:

Class : Class 5
it was tricky

Ans 7:

Class : Class 6
Ans is B because if we give the person raw mango juice or ORS, the person will feel better and get more energy while A, C and D options can make more problems.

Ans 8:

Class : Class 5
answer is b

Ans 9:

Class : Class 5

Ans 10:

Class : Class 5
Shreshta and somyaraj are both foolish

Ans 11:

Class : Class 6
Kudukku potiya kupayam , I am speaking Malayalam . This question is wrong and also the most boring in the whole world !!!!! Most boring in the whole world . On the floor baby . Hit it hard baby . Rock the party baby . I am in Thiruvananthapuram .

Ans 12:

Class : Class 5
Ok 👌 Yup. That’s it.

Post Your Answer