Winds, Storms a...

It is difficult to ride a bicycle against the direction of flow of wind because the

To reduce the air pressure falling on banners and hoardings

Two identical glass beakers A and B are placed on a tabletop. Beaker A is filled with distilled water and beaker B is filled with salty water. Choose the correct statement from among the following.

Read the following statements and choose the correct option:

Statement A: If you fill a bottle partially with very hot water, and then stretch a balloon over the top, the balloon will inflate slightly over the next few minutes.
Statement B: The heat in the water causes the balloon to inflate.

Read the following statements and choose the correct option:

Statement A: When a suction cup is pressed against a smooth wall, the air inside is pushed out of the cup.
Statement B: Atmospheric pressure holds the cup against the wall as force is exerted on the cup due to the atmospheric pressure.

Two balloons are hanging by threads. Air is blown within the balloons with the help of a straw. Then, the

The main cause of wind movement is the

A piece of plywood is kept on a table. You have to lift it from the table by blowing air around at very high speed from a powerful fan. In which direction will you blow the air?

Read the following statements and choose the correct option:

Statement 1: One should build a house with windows and ventilators.
Statement 2: Warm air is lighter than cool air, which rises up and exits through the ventilators. Cool air is heavier and thus, moves in through the windows, making the room comfortable for living.

Choose the correct statement(s) from among the following:

If Earth starts spinning in the opposite direction, then

A. the tropical cyclone winds will rotate anticlockwise in the northern hemisphere and clockwise in the southern hemisphere
B. the sun will rise in the west and set in the east
C. trade winds will flow from north west