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

Raju drank water in a fair and was affected by Dengue.

Analogy.

Tuberculosis: Lungs
Rabies: ______.

Complete the table.

Tuberculosis: ______.
______: Virus.

Complete the table.

Tuberculosis: ______.
______: Rashes.

Name two diseases that can be prevented by vaccination.

What is a ‘Vaccine’?

The source which produces a small amount of electricity for a shorter period of time is called an electrochemical cell.

The electric cell converts electrical energy into chemical energy.

The pipe is like the wire in the electric circuit and the pump is like the battery.

Assertion (A): A current-carrying wire should be charged.
Reason (R): The current in a wire is due to the flow of free electrons in a definite direction.

Assertion (A): The connecting wires are made of copper.
Reason (R): The electrical conductivity of copper is high.

Write the analogy between water current and electric current.

All prokaryotic belong to kingdom ______.

The angle formed between the reflected ray and the normal is ______.

Angle of incidence is greater than the angle of reflection.

Diffused reflection gives a sharp image.

Assertion (A): A ray incident along normal to the mirror retraces its path.
Reason (R): In reflection, the angle of incidence is always equal to the angle of reflection.

A ray of light fall on a plane surface at an angle of incidence of 9° and reflection occurs. Calculate the angle of reflection in degree.

Which of the following fibers is considered the strongest natural fiber?

______ are substances applied to the exterior of a body that kills microbes.