National Science Olympiad Level 2 Solved Papers 5 Years Instant Class 2023

II - Higher pitch, I - Louder

I - Louder, II - Higher pitch

I - Higher pitch, II - Louder

II - Louder, I - Higher pitch (correct)

Nose bleeding (correct)

Dizziness

Frostbite

Shortness of breath

The increased oxygen concentration at high altitudes directly affects the blood vessels in the nose.

The blood pressure of their body becomes much less than the atmospheric pressure, making the blood vessels burst. (correct)

The low temperature at high altitudes causes the blood vessels in the nose to contract and burst.

The blood pressure of their body becomes much higher than the atmospheric pressure, causing the blood vessels to burst.