Following is the diagram representing different adaptations. The blue circle represents egg-laying animals. Similarly, the yellow circle represents animals living on land and red circle represents animals breathing through gills

Answer the following questions on the basis of this diagram.

1. In which of the following regions will you find terrestrial animals? Give examples of each.
2. In which region will you place a fish?
3. Which of the following animals will you place in region E: Dolphin, Crocodile, Bird?
4. In which of the following region/s will you find carnivores: A, C, D, F? Give examples of each.

(See the solved example for better understanding)

For Example:

Question: Where will you place a hen in this diagram?

Answer: Hen is an animal which lives on land and lays eggs so it must be in a region common to yellow and blue circle i.e. F and G. But since, hen breathes through lungs and not through gills so they must not be present in a region common to all three circles i.e. G. So, the final answer will be F.

(A) Explain 12-hour and 24-hour clocks. Explain the differences and similarities between them.

(B) Explain the significance of A.M and P.M in time.

Make a video explaining the answers of above questions.

The figure shows the shadow of two balls I and II. Balls I and II are hung directly beneath a divergent light source shown in the figure. Thus the two balls form their respective shadows as illustrated in the figure.

(No information is provided about the size of the balls and the different positions at which they are hung below the lamp.)

Answer the following question based on the above descriptions.

Is it possible that the ball II can be bigger in size than ball I? Describe with a proper explanation by suggesting possible positions of both the balls.

Consider the Rutherford alpha-particle scattering experiment and make a video explaining the answers to the following questions.

1. If Rutherford used a ‘very thick’ gold foil instead of ‘very thin’ gold foil in his alpha-particle scattering experiment, would he have got the same conclusions from his experiment? Explain your answer with proper description.
2. Suppose a thin sheet of platinum is crafted. You use the platinum sheet to perform the Rutherford alpha-particle scattering experiment. Will your observations differ from that when gold foil was used? Support your answer with proper explanation.

(Assume the thickness of the platinum sheet to be similar to that of the gold foil used by Rutherford).