Advertisements
Advertisements
Question
Select the correct alternative
Which of the statement is correct
Options
Iron rims are cooled before they are placed on cartwheels
A glass stopper gets tight on warming the neck of the bottle
Telephone wires sag in winter, but become tight in summer
A little space is left between two rails on a railway track
Advertisements
Solution
A little space is left between two rails on a railway track
APPEARS IN
RELATED QUESTIONS
Write true or false for a given statement.
Land and sea breezes are convection currents of cold and warm air.
Fill in the blank
We use a ________ for measuring the temperature of a body.
Fill in the blank
In a thermometer, the commonly used liquid is _______
Describe one experiment to show that liquids expand on heating.
An empty glass bottle is fitted with a narrow tube at its mouth. The open end of the tube is kept in a beaker containing water. When the bottle is heated, bubbles of air are seen escaping into the water. Explain the reason.
Name a solid which is a good conductor of heat.
Explain why we wear woolen clothes in winter.
Explain why the water pipes are covered with cotton during very cold weather.
What are the land and sea breezes? Explain their formation.
Match the following
| 1. | Solid to liquid | a. | Condensation |
| 2. | Liquid to gas | b. | Deposition |
| 3. | Gas to solid | c. | Melting |
| 4. | Gas to liquid | d. | Vaporization |
