Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 9th
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Question Bank Solutions for SSLC (English Medium) Class 9th - Tamil Nadu Board of Secondary Education - Science

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Science
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In going from a rarer to denser medium, the ray of light bends ______.

[0.06] Light
Chapter: [0.06] Light
Concept: Light

The mirror used in search light is ______.

[0.06] Light
Chapter: [0.06] Light
Concept: Light

The angle of deviation of light ray in a prism depends on the angle of ______.

[0.06] Light
Chapter: [0.06] Light
Concept: Light

Match the following.

1. Ratio of height of image to height of object. Concave mirror
2. Used in hairpin bends in mountains. Total internal reflection
3. Coin inside water appearing slightly raised. Magnification
4. Mirage Convex mirror
5. Used as Dentist’s mirror. Refraction
[0.06] Light
Chapter: [0.06] Light
Concept: Light

a) Draw ray diagrams to show how the image is formed using a concave mirror, when the position of object is:

  1. at C 
  2. between C and F
  3. between F and P of the mirror.

b) Mention the position and nature of image in each case.

[0.06] Light
Chapter: [0.06] Light
Concept: Light

Calorie is the unit of ______.

[0.07] Heat
Chapter: [0.07] Heat
Concept: Heat and Its Unit

A device in which the loss of heat due to conduction, convection and radiation is minimized is ______.

[0.07] Heat
Chapter: [0.07] Heat
Concept: Heat and Its Unit

Ice is kept in a double-walled container. Why?

[0.07] Heat
Chapter: [0.07] Heat
Concept: Heat and Its Unit

Which of the following vibrates when a musical note is produced by the cymbals in a orchestra?

[0.08] Sound
Chapter: [0.08] Sound
Concept: Sound

Sound travels in air:

[0.08] Sound
Chapter: [0.08] Sound
Concept: Sound

A musical instrument is producing continuous note. This note cannot be heard by a person having a normal hearing range. This note must then be passing through ______.

[0.08] Sound
Chapter: [0.08] Sound
Concept: Sound

The sound waves travel faster ______.

[0.08] Sound
Chapter: [0.08] Sound
Concept: Sound

Sound is a ______ wave and needs a material medium to travel.

[0.08] Sound
Chapter: [0.08] Sound
Concept: Sound

Number of vibrations produced in one second is ______.

[0.08] Sound
Chapter: [0.08] Sound
Concept: Sound

Vibration of object produces ______.

[0.08] Sound
Chapter: [0.08] Sound
Concept: Sound

Match the following.

1. Tuning fork The point where density of air is maximum
2. Sound Maximum displacement from the equilibrium position.
3. Compressions The sound whose frequency is greater than 20,000 Hz.
4. Amplitude Longitudinal wave.
5. Ultasonics Production of sound.
[0.08] Sound
Chapter: [0.08] Sound
Concept: Sound

Through which medium sound travels faster, iron or water? Give reason.

[0.08] Sound
Chapter: [0.08] Sound
Concept: Sound

How does the sound produced by a vibrating object in a medium reach your ears?

[0.08] Sound
Chapter: [0.08] Sound
Concept: Sound

Describe with diagram, how compressions and rarefactions are produced.

[0.08] Sound
Chapter: [0.08] Sound
Concept: Sound

State whether true or false. If false, correct the statement.

Oil and water are immiscible with each other.

[0.1] Matter Around Us
Chapter: [0.1] Matter Around Us
Concept: Matter (Substance)
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