SSLC (English Medium) इयत्ता ६ - Tamil Nadu Board of Secondary Education Question Bank Solutions

Give reasons for the following:

Gaps are left in between rails while laying a railway track.

How will you identify two objects are said to be in thermal equilibrium?

When ‘Touch me not’ plant is touched by us, ______ changes occur.

Analogy:

Irreversible change: Making idly front batter.
Reversible change: ______.

The blackening of the Silver anklet is a (an) ______.

Touch me not plant: ______:: digestion of food: Irreversible change.

______ muscles are found in the walls of the digestive tract, urinary bladder arteries, and other internal organs.

What is the name of the muscles in the heart?

The compass has a magnetic needle that can rotate easily.

Give any two tips to store bar magnets.

Magnets are used to find directions. So they are called as ______.

Who invented cement?

______ concrete is a composite material by mixing iron mesh with cement.

______ invented Portland cement.

Mortar is a paste of cement and sand mixed with water.

‘Portland’ cement resembled the high-quality building stones found in Portland, England.

Reinforced Cement Concrete is a mixture of cement, sand, and gravel.

Why the cement is called as Portland cement?

What are the uses of cement?

Analogy:

______: Mortar:: Construction of bridges: Concrete.