Explain why
To keep a piece of paper horizontal,you should blow over,not under it.

Explain why a paper boat tied to a piece of a camphor goes on moving on the surface of water.

Why should we recyle paper?

Carry out the following osmosis experiment: Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now, Keep cup A empty. Put one teaspoon sugar in cup B. Put one teaspoon salt in cup C. Put one teaspoon sugar in the boiled potato cup D. Keep these for two hours. Then observe the four potato cups and answer the following: Explain why water does not gather in the hollowed out portions of A and D.

Explain why A drop of liquid under no external forces is always spherical in shape.

Construct a /_\ PET , PE = 4.5 cm, ET = 5.4 cm and TP = 6.5 cm in your notebook. Now construct /_\ ABC , AB = 5.4 cm ,BC = 4.5 cm and CA = 6.5 cm on a piece of paper. Cut it out and place it on the figure you have constructed in your notebook. Are the triangles congruent? Write your answer using mathematical notation.