Question

Tomorrow is my science test-
Force and law of motion
Gravitation
Is matter around us
Tissues
Fundamental unit of life

Can anyone guide me if yes then comment for contacting ​

Answer 1

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Imp questions of force and laws of motion..

1. State two effects of force.

2. Scientist who first conducted experiment to form the base for Newton's first law of motion.

3. If first law of motion holds true, why does a ball rolling on ground stop on its own?

4. What would happen if there was no friction on the Earth?

5. What would happen if gravitational force of the Sun suddenly vanishes?

6. What did Galileo observe by placing two inclined planes facing each other and rolling down a marble ball from top end of one of them?

7. What is the negative effect of friction on your shoe soles?

8. You are applying force on the pan of single pan weighing balance and the pointer points to 100 g. What is the force in newtons applied by you?

9. An athlete always runs some distance before taking a jump. Why?

10. A cricket ball of mass 70 g moving with a velocity of 0.5 m/s is stopped by a player in 0.5 s. What is the force applied by the player to stop the ball?

11. In a cricket match, why does a player lower his hands slightly while catching the ball?

12. Two cars having masses in the ratio 4 : 5, accelerate in the ratio 2:3. Find the ratio o forces exerted by each of them.

Imp questions of gravitation.

1. Earth attracts apple from the tree and it falls on it but the earth does not move towards the apple. Why?

2. Is uniform circular motion taking place at a constant speed or constant velocity? Why?

3. Name the force which is required to maintain a body in uniform circular motion?

4. A ball is projected vertically upwards with an initial velocity of u goes to a maximum height h before coming to ground. What is the value of h?

5. Is value of ‘g’ same everywhere?

6. Find relationship between ‘g’ and ‘G’

7. During a free-fall what is the weight of a body. Give reason for the answer.

8. A stone and feather are thrown from a tower, both the objects should reach the ground at same time but it does not. Why?

9. What is the value of ‘G’, universal gravitational constant?

10. Find the value of ‘g’, acceleration due to gravity.

11. Calculate value of ‘g’ on moon.

12. Show that the weight of the body on moon =1/6 of the weight of the body in earth.

Imp questions of is matter around as

1. What is tincture of iodine?

2. Any idea about ‘concentration of a solution’?

3. State the principle for separation of immiscible liquids?

4. Why a mixture is an impure substance?

5. Define aerosol.

6. What is meant by solubility of a solute?

7. How to differentiate between sol, solution and suspension?

8. What is meant by chromatography?

9. Define emulsion with example.

10. How to separate ammonium chloride+ sodium chloride. Explain briefly.

Imp questions of tissues.

1. Give four differences between bone and cartilage.

2. Give the functions of cartilage.

3. Give difference between xylem and pholem.

4. What is stomata?

5. Why does epidermal tissue have no intercellular space?

6. Name and give the function of each cell of xylem.

7. Why is blood called connective tissue?

8. State the difference between simple tissues of plants.

9. Explain the structure, function and location of nervous tissue.

10. Describe ‘epidermis’ in plants.

Imp questions of fundamental unit of life.

1. What is cell theory? Who formulated it?

2. Write the full form of DNA and ATP.

3. What is the importance of nucleus?

4. Explain the process of osmosis through an example.

5. Draw and label a Plant cell neatly.

6. Why is Plasma Membrane a selectively permeable membrane?

7. What is the function of chromosome?

8. Name the cleansing organelle in the cell.

9. How does amoeba consume food?

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