English Medium इयत्ता ९ - CBSE Question Bank Solutions

A truck of mass 500 kg moving at 4 m/s collides with another truck of mass 1500 kg moving in the same direction at 2 m/s. What is their common velocity just after the collision if they move off together ?

A ball X of mass 1 kg travelling at 2 m/s has a head-on collision with an identical ball Y at rest. X stops and Y moves off. Calculate the velocity of Y after the collision.

A heavy car A of mass 2000 kg travelling at 10 m/s has a head-on collision with a sports car B of mass 500 kg. If both cars stop dead on colliding, what was the velocity of car B ?

A man wearing a bullet-proof vest stands still on roller skates. The total mass is 80 kg. A bullet of mass 20 grams is fired at 400 m/s. It is stopped by the vest and falls to the ground. What is then the velocity of the man?

Explain why do spinach look green, papaya yellow and edible part of water melon red?

Define the following term: 

Protoplasm

List one function of the Following : 1.Osteoblast

List One Function of the Following : 2. Chondroblasts

What is the function of bone, cartilage and ligament?

Name the following :

(a) Tissue which stores fat

Give three functions of blood.

The rockets work on the principle of conservation of :

Distinguish between the following pairs in one or two sentences for each

(a) RBCs and WBCs;

(b) bone and cartilage;

(c) blood and lymph.

(d) tendon and ligament

Classify connective tissue and give one example of each type.

Describe the composition and functions of blood.

Write short note on Pulse Polio Programme.

Define diarrhoea.

How does dehydration set in during diarrhoea?

"We can treat an infectious disease by killing microbe". Justify the statement with suitable examples.

Write short note on principle of treatment.