Advertisements
Advertisements
प्रश्न
Explain why rivers and lakes do not freeze easily.
Advertisements
उत्तर
Because water has a large specific heat capacity—that is, it absorbs a lot of heat before chilling down—rivers and lakes do not freeze easily. Also, the freezing process is slowed down by the flow of water and the development of an insulating layer of ice on the surface.
APPEARS IN
संबंधित प्रश्न
Use of excessive .................... by farmers causes water pollution.
A captain of ship will tell you that an iceberg is much bigger than it looks. Why is it so ?
Give balanced chemical equations to show the reaction between Magnesium and water.
Explain why:
Fused CaCl2 or conc. H2SO4 is used in a desiccator.
Complete the statement by filling the blank with the correct word from the option.
The ratio of hydrogen & oxygen in water is ____.
Fill in the blank:
Unpolluted water has _____ amount of dissolved oxygen.
Which of the following does not show water shortage?
From where do the following usually get water? In which form is water present in them?
Aquifer
Fill in the blanks in the following statements using words given in the box.
| air, handpumps, cholera, water, large, ground |
A very ______ number of our people defecate in the open. It may cause ______ pollution and soil pollution. Both the surface water and ______ water get polluted. ______ water is the source for wells, tubewells and ______. Thus it becomes the most common route for ______ borne diseases like ______, dysentery, etc.
Think and suggest some ways to minimise waste and pollutants at their source, taking your home as an example.
