CBSE Class 9, Sound: Important Questions & Preparation Tips

Get the CBSE Class 9th Science chapter, Sound: Important Questions & Preparation Tips. These questions and preparation tips will provide you with a very clear idea about the type of questions that are framed for the exam and will also make you familiar with the important topics to pick for exam preparation. The pattern in which the Question Paper is set is quite different from the style in which the course structure is actually defined. Consider the below mentioned terms/questions at the time of preparation.

Check out the preparation tips given below:

           (a) Loudness? (b) Pitch?

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          1. Pinna

          2. Auditory canal

          3. Tympanic membrane

          4. Cochlea

CBSE Class 9 Science: Important Questions & Preparation Tips

Important Questions are as below:

Q. What happens when a wave travels through a medium?

1) Particles are transferred from one place to another

2) Energy is transferred in a periodic manner

3) Energy is transferred at a constant speed

4) None of the above statements is applicable

Q. Bats detect the obstacles in their path by receiving the reflected

1) Ultrasonic waves

2) Electro-magnetic waves

3) Radio waves

4) Infrasonic waves

Q. The physical quantity, which oscillates in most waves, is

1) Wave length

2) Energy

3) Amplitude

4) Mass

Q. The distance between a compression and the next rarefaction of a longitudinal wave is __________.

1) λ/8

2) 2l

3) λ/4

4) λ/2

Q. When is echo heard?

1) If the time interval between original sound and reflected sound is more than 1/10 sec.

2) If the time interval between original sound and reflected sound is less than 1/20 sec.

3) If the time interval between original sound and reflected sound is less than 1/10 sec.

4) If the time interval between original sound and reflected sound 1/20 sec.

Q. What type of sound wave can propagate in solids?

1) Longitudinal only

2) Transverse only

3) Either longitudinal or transverse

4) Non mechanical wave only

CBSE Class 9 Mathematics and Science Tips and Strategies

CBSE Class 9 Important Questions & Preparation Tips: Mathematics

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