English Medium इयत्ता ९ - CBSE Question Bank Solutions for Science

Conduct a survey in your neighbourhood to find out what the three most common diseases are. Suggest three steps that could be taken by your local authorities to bring down the incidence of these diseases.

A baby is not able to tell her/his caretakers that she/he is sick. What would help us to find out

(a) that the baby is sick?

(b) what is the sickness?

Under which of the following conditions is a person most likely to fall sick?

(a) when she is recovering from malaria.

(b) when she has recovered from malaria and is taking care of someone suffering from chicken-pox.

(c) when she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chicken-pox.

Why?

Under which of the following conditions are you most likely to fall sick?

(a) when you are taking examinations.

(b) when you have travelled by bus and train for two days.

(c) when your friend is suffering from measles.

Why?

State which of the following situation is possible and give an example:

An object with a constant acceleration but with zero velocity.

How is soil formed?

What is soil erosion?

What are the methods of preventing or reducing soil erosion?

How are living organisms dependent on the soil? Are organisms that live in water totally independent of soil as a resource?

We know that many human activities lead to increasing levels of pollution of the air, water-bodies and soil. Do you think that isolating these activities to specific and limited areas would help in reducing pollution?

Write a note on how forests influence the quality of our air, soil and water resources.

Discuss the implications of the following statement:

“It is interesting to note that poultry is India’s most efficient converter of low fibre food stuff (which is unfit for human consumption) into highly nutritious animal protein food.”

What management practices are common in dairy and poultry farming?

What are the differences between broilers and layers and in their management?

How are high yielding breeds of poultry advantageous over indigenous breeds?

Write a short note on 'Prevention of poultry diseases'?

Write down differences between nucleus and nucleoid

Name the Following :(B) Largest Cell Organelle

Name the following :(d) Functional segments of the DNA molecule.

What will happen in a cell if its nucleus is removed? Give reasons in support of your answer.