SSC (Marathi Semi-English) 9th Standard [इयत्ता ९ वी] - Maharashtra State Board Question Bank Solutions for Science and Technology

What is meant by Unified Atomic Mass?

Correct and rewrite the following statement and justify your correction.

Carnivores occupy the second trophic level in the food chain. 

Give reason.

Energy flow through an ecosystem is ‘one way’. 

Explain the following with suitable examples. 

What type of changes occur in the amount of energy during its transfer from plants to apex consumers? 

Which application software in the computer system did you find useful while studying science, and how? 

What precautions should be taken while using various types of software on the computer?

Fill in the blank to complete the statement. Justify the statement.

The first-generation computers used to shut down because of ______.

Write a short note.

Striated muscles

The following statement is wrong. Rewrite it correctly by changing either one or two words. 

Striated muscles are also called involuntary muscles.

Explain the construction of a radio telescope. 

GMRT is used for ______ waves.

Give a scientific explanation.

Bleaching powder has the odour of chlorine.

Write the chemical formula.

Bleaching powder

Explain the difference: 

Diamond and graphite

How will you prove experimentally that graphite is a good conductor of electricity?

Write scientific reasons.

Graphite is a conductor of electricity. 

Write scientific reasons.

Graphite is not used in ornaments.

If a spherical mirror breaks, what type of mirrors are the individual pieces?

Three mirrors are created from a single sphere. Which of the following - pole, centre of curvature, radius of curvature, principal axis - will be common to them and which will not be common? 

Give a scientific reason.

The velocity of an object at rest is considered to be uniform.