Question

1.Name the part of ear in humans, which is like a stretched membrane that separates external ear to the middle ear.
Pinna
Internal ear
Eardrum
None of them

2. In a silkworm ,the eggs are hatched to produce-
Pupa
Larva
Adult Silkworm
None of these

3. Which of the following characteristics of sound depends on the amplitude of vibrations?
Pitch
Loudness
Speed
None of these

4. Binary fission is observed in
Amoeba
Hydra
Fish
Hunans

5. A simple pendulum makes 20 oscillations in 80 seconds. What is the time period and frequency of its oscillation?
4 sec, 0.25 hertz
2 sec, 0.25 hertz
4 sec , 0.20 hertz
None of these

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Answer 1

Answer:

Components in the outer ear:

Apart from the funnel, there is a Pinna. The Pinna is attached to about 2 to 3 centimetre long passage called ear Canal. At the end of ear canal a thin, elastic and circular membrane called an eardrum is stretched tightly.

Explanation:

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Answer 2

Answer:

Eardrum

Larva

Loudness

Amoeba