SSLC (English Medium) Class 7 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

Cutting a log of wood into pieces is a chemical change.

Iron pipes coated with zinc do not get rusted easily.

Adding sugar to milk is a physical change.

Mention a few physical properties of a substance.

Mention some of the different conditions needed for chemical changes to occur.

Give an example of a physical change in which the color of the substance changes.

Explain the characteristics of physical change with examples.

Give an example to justify the statement that physical changes can be reversible as well as irreversible.

Define a tissue.

______  was a greek philosopher who classified animals.

Which of the following is a natural source of light?

Which of the following is not a luminous object?

Objects which are able to emit light are known as ______.

Passing electricity through certain gases at very low pressure can produce ______.

What is the composition of sunlight?

State the size of the image formed by a plane mirror?

What is natural sources of light? Give example.

Mention the properties of light.

When lighting bulbs in a dark room, light spreads the whole room quickly. Give reason.

The reversal of direction of planets is called as ______.