English Medium Class 9 - CBSE Question Bank Solutions for Science

Which among the following have scales?

1. Amphibians
2. Pisces
3. Reptiles
4. Mammals

Which is not an aquatic animal?

Amphibians do not have the following

Which of the following is not a criterion for classification of living organisms?

Corals are

Write true (T) or false (F)

Starting from Class, Species comes before the Genus.

______ has smallest number of organisms with maximum number of similar characters

You are provided with the seeds of gram, wheat, rice, pumpkin, maize, and pea. Classify them whether they are monocot or dicot.

Classify the following organisms based on the absence/presence of true coelom (i.e., acoelomate, pseudocoelomate and coelomate)

Spongilla, Sea anemone, Planaria, Liver fluke Wuchereria, Ascaris, Nereis, Earthworm, Scorpion, Birds, Fishes, Horse.

Label a,b,c and d. given in Fig. 7.1 Give the function of (b)

Fill in the boxes given in Fig. 7.2 with appropriate characteristics/plant group (s)

Write names of few thallophytes. Draw a labelled diagram of Spirogyra.

You are given leech, Nereis, Scolopendra, prawn and scorpion; and all have segmented body organisation. Will you classify them in one group? If no, give the important characters based on which you will separate these organisms into different groups.

Two balls of the same size but of different materials, rubber and iron are kept on the smooth floor of a moving train. The brakes are applied suddenly to stop the train. Will the balls start rolling? If so, in which direction? Will they move at the same speed? Give reasons for your answer.

What is momentum? Write its SI unit. Interpret force in terms of momentum. Represent the following graphically

(a) momentum versus velocity when mass is fixed.

(b) momentum versus mass when velocity is constant.

In the relation F = `"G M" "m"//"d"^2`, the quantity G

The force of attraction between two unit point masses separated by a unit distance is called

On the earth, a stone is thrown from a height in a direction parallel to the earth’s surface while another stone is simultaneously dropped from the same height. Which stone would reach the ground first and why?

Suppose the gravity of the earth suddenly becomes zero, then in which direction will the moon begin to move if no other celestial body affects it?

How does the force of attraction between the two bodies depend upon their masses and the distance between them? A student thought that two bricks tied together would fall faster than a single one under the action of gravity. Do you agree with his hypothesis or not? Comment.