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

______ is the degree of hotness or coldness of a body.

Which factor determines the direction of flow of heat from one body to another?

What is the minimum possible temperature? Is there also a maximum possible temperature?

What do you mean by thermal equilibrium?

Why are burns caused by steam more painful than those caused by boiling water at the same temperature?

Define absolute zero.

Explain the following effects of heat.

Change in temperature

What will be the final temperature if 1,68,000 J of heat is absorbed by 2 kg of water at 30°C?

What is the composition of the sun? How was it formed?

The process that takes place in the Sun is ______.

The energy of the sun is radiated in the form of ______ Rays.

Sun is the star present in the galaxy called ______.

The Greek name for the Sun is ______.

The sun is believed to be more than ______ years ago.

The ratio of ______ of the periods of any two planets is equal to the ratio of their ______ semi-major axis from the Sun.

The planets are revolving around the sun because of the gravitational force of attraction between them.

The Pole star is not visible from the southern hemisphere.

The rotation of the sun near the poles takes around 25.4 days.

Assertion: Sun is a medium-sized star.
Reason: Sun is situated at the center of the solar system.

Assertion: At the pole, the value of acceleration due to gravity (g) is greater than the equator.
Reason: Earth rotates on its axis in addition to revolving around the sun.