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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 8

SSLC (English Medium) Class 8 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

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How does carbon dioxide react with the following?

  1. Potassium
  2. Lime water
  3. Sodium hydroxide
[11] Air
Chapter: [11] Air
Concept: undefined >> undefined

Define the following.

Specific heat capacity

[13] Water
Chapter: [13] Water
Concept: undefined >> undefined

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Friction depends on the ______ of two surfaces in contact.

[2] Force and Pressure
Chapter: [2] Force and Pressure
Concept: undefined >> undefined

Analogy

Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.

[2] Force and Pressure
Chapter: [2] Force and Pressure
Concept: undefined >> undefined

Assertion: Friction always opposes the motion.
Reason: Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.

[2] Force and Pressure
Chapter: [2] Force and Pressure
Concept: undefined >> undefined

Assertion: We can live very happily if friction is not present in nature.
Reason: The airplane shape is streamlined to reduce the effort of frictional force.

[2] Force and Pressure
Chapter: [2] Force and Pressure
Concept: undefined >> undefined

Assertion: There is a danger of a vehicle skidding on a wet road.
Reason: The tires of the vehicle lose their grip on the road due to an increase in friction due to the presence of water on the road.

[2] Force and Pressure
Chapter: [2] Force and Pressure
Concept: undefined >> undefined

In dispersion, the color of light that will bend more is ______.

[3] Light
Chapter: [3] Light
Concept: undefined >> undefined

The periscope is an optical device with a polished surface that reflects the light falling on it.

[3] Light
Chapter: [3] Light
Concept: undefined >> undefined

Curved mirrors have surfaces that are spherical, cylindrical, parabolic, and ellipsoid.

[3] Light
Chapter: [3] Light
Concept: undefined >> undefined

Assertion: We can see the rainbow in the sky when the rain starts falling after a spell of bright sunlight.
Reason: The rainbow is formed due to the dispersion of light.

[3] Light
Chapter: [3] Light
Concept: undefined >> undefined

What is a rainbow?

[3] Light
Chapter: [3] Light
Concept: undefined >> undefined

Electroplating is based on ______ effect of electricity.

[5] Electricity
Chapter: [5] Electricity
Concept: undefined >> undefined

An electrolyte ______.

[5] Electricity
Chapter: [5] Electricity
Concept: undefined >> undefined

A layer of zinc-coated over iron. Why?

[5] Electricity
Chapter: [5] Electricity
Concept: undefined >> undefined

The time taken for one complete vibration is called its ______.

[6] Sound
Chapter: [6] Sound
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What are the symptoms of hearing loss?

[6] Sound
Chapter: [6] Sound
Concept: undefined >> undefined

What is meant by audible sound?

[6] Sound
Chapter: [6] Sound
Concept: undefined >> undefined

______ became the first Indian woman astronaut to go to space.

[8] Universe and Space Science
Chapter: [8] Universe and Space Science
Concept: undefined >> undefined

Write about Sunitha William’s work at NASA.

[8] Universe and Space Science
Chapter: [8] Universe and Space Science
Concept: undefined >> undefined
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