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

State whether true or false. If false, correct the statement.

With the help of vernier caliper we can have an accuracy of 0.1 mm and with screw gauge we can have an accuracy of 0.01 mm.

How will you measure the least count of vernier caliper?

The main scale reading while measuring the thickness of a rubber ball using Vernier caliper is 7 cm and the Vernier scale coincidence is 6. Find the radius of the ball.

The magnitude of buoyant force acting on an object immersed in a liquid depends on ______ of the liquid.

State whether true or false. If false, correct the statement.

The weight of fluid displaced determines the buoyant force on an object.

Higher Order Thinking Skill.

How does a fish manage to rise up and move down in water?

In an electrolyte the current is due to the flow of ______.

Electroplating is an example for ______.

Transformer works on ______.

Devices which is used to convert high alternating current to low alternating current is ______.

State whether true or false. If false, correct the statement.

A transformer can step up direct current.

Alcohol can be separated from water by ______.

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 ______.