English Medium Class 9 - CBSE Question Bank Solutions

How do poriferan animals differ from coelenterate animals?

How do annelid animals differ from arthropods?

What are the differences between amphibians and reptiles?

What are the differences between animals belonging to the Aves group and those in the mammalia group?

How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?

Explain how animals in Vertebrata are classified into further subgroups.

What are the different means by which infectious diseases are spread?

What precautions can you take in your school to reduce the incidence of infectious diseases?

What is reverberation?

Why is heat energy needed to melt a solid ? What is this heat energy called ?

Would you cool a bucket of water more quickly by placing it on ice or by placing ice in it? Give reasons for your answer.

Which produces more severe burns : boiling water or steam ? Why ?

Define the following terms Condensation

Define the following term Freezing.

Why does all the water of the earth not get evaporated during hot summer days ?

If the back of your hand is moistened with alcohol, you will find that it rapidly becomes dry. Why is it that while it is drying, your hand feels cool ?

How does the water kept in an earthen pot (matka) become cold during summer ?

What type of clothes should we wear in summer ? Why ?

Why are we able to sip hot tea or milk faster from a saucer rather than from a cup ?

Why does our palm feel cold when we put some acetone (or perfume) on it ?