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

Chlorinated hydrocarbons are used as ______.

______, ______ and ______ are macronutrients required for plant growth.

What is the need for chemical fertilizers in crop fields?

Higher Order Thinking Skill.

The soil pH of a crop land is 5. What kind of fertilizers should be used in that land?

Water vascular system is found in ______.

How does locomotion take place in starfish?

Are jellyfish and starfish similar to fishes? If no justify the answer.

An internal factor responsible for spoilage of food is ______.

The process of affecting the natural composition and the quality of food substance is known as ______.

Poliomyelitis virus enters the body through ______.

Least count of a vernier caliper is ______ cm.

An instrument that is used to measure the diameter of a cricket ball is ______.

The precision of vernier calipers is ______ mm.

A vernier caliper using the scale invented by Galileo.

How will you find the Zero Error of Vernier Caliper? Explain.

Most buoyant objects are those with relatively ______.

1. high volume
2. higher mass
3. low density
4. less viscosity

The upward force that is caused due to the pressure difference in liquid (or fluid) is called ______.

Icebergs and ships stay afloat due to ______.

The point at which the force of buoyancy is supposed to act is known as ______.

The center of gravity of the floating body and the center of buoyance are in the same ______ line.