SSC (English Medium) ७ वीं कक्षा - Maharashtra State Board Question Bank Solutions for General Science

The ______ is used while defining the zodiac signs.

Classified according to seasons, one season will have ______ nakshatras.

The rising of the sun in the east and its setting in the west is the ______ motion of the sun.

What points should be considered before a skywatch?

The frequency of sound is measured in ______.

Explain how the frequency of oscillation is related to the length of a pendulum and the amplitude of its oscillation.

Explain the two ways by which the pitch of the sound generated by a stretched string can be changed. 

Write an answer to the following question in your own words.

What is a cloudburst?

The organelle called the ______ is present in plant cells only.

In the cell, photosynthesis is carried out with the help of ______.

Sketch and describe in your own words the plant cell.

The substance that helps water to remove dirt from the surface of materials is called ______.

Synthetic detergents can be used in ______ water as well.

How does the use of detergent help to clean soiled clothes?

Make a list of detergents that you use. 

What should be expected from detergent for delicate garments?

What are the similarities between Natural detergents and man-made detergents?

Explain why oil does not mix in water. However, oil and water become homogeneous if a sufficient quantity of detergent is added.

Give scientific reason.

In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.

Give scientific reason.

In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.