|
Describe an activity to demonstrate that warm air is lighter than cool air
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|
0
|
6193
|
March 24, 2018
|
|
List two reasons that can cause floods
|
|
0
|
822
|
March 24, 2018
|
|
List the dangers associated with a cyclone
|
|
0
|
745
|
March 24, 2018
|
|
Write three precautions that need to be taken during a thunderstorm
|
|
0
|
1433
|
March 24, 2018
|
|
Write three precautions that need to be taken in cyclone prone areas
|
|
0
|
4088
|
March 24, 2018
|
|
Which one of the following place is unlikely to be affected by a cyclone?
|
|
0
|
9107
|
March 24, 2018
|
|
What planning is required in advance to deal with the situation created by a cyclone?
|
|
0
|
11005
|
March 24, 2018
|
|
How will you help your neighbours in case cyclone approaches your village/town?
|
|
0
|
7799
|
March 24, 2018
|
|
Explain why holes are made in hanging banners and hoardings
|
|
0
|
5278
|
March 24, 2018
|
|
You want to buy a house. Would you like to buy a house having windows but no ventilators? Explain your answer
|
|
0
|
4615
|
March 24, 2018
|
|
State two experiences that made you think that air exerts pressure other than those given in the text)
|
|
0
|
12432
|
March 24, 2018
|
|
Suggest two methods to find out wind direction at a given place
|
|
0
|
1981
|
March 24, 2018
|
|
Suggest some precautions to be taken to prevent the roof of a tin sheet from flying away during a fierce wind storm
|
|
0
|
3311
|
March 24, 2018
|
|
When strong/high speed wind blows, an umbrella held upright at times gets upturned
|
|
0
|
4173
|
March 24, 2018
|
|
Paheli kept an empty bottle made of plastic inside a refrigerator
|
|
0
|
3683
|
March 24, 2018
|
|
Explain how soil pollution and soil erosion could be prevented
|
|
0
|
7298
|
March 24, 2018
|
|
List the differences between clayey soil and sandy soil
|
|
0
|
7793
|
March 24, 2018
|
|
Explain how soil is formed
|
|
0
|
18358
|
March 24, 2018
|
|
In towns and cities, generally, the bore wells have to be dug very deep to get water as compared to bore wells dug in villages
|
|
0
|
4404
|
March 24, 2018
|
|
Gardeners gently dig up the soil around the roots of garden herbs (plants) frequently
|
|
0
|
2827
|
March 24, 2018
|
|
Why is soil erosion relatively less in dense forests as compared to barren, open fields?
|
|
0
|
4698
|
March 24, 2018
|
|
Continuously water-logged soils are disadvantageous for plant growth. Why?
|
|
0
|
1801
|
March 24, 2018
|
|
How can you calculate the absorption of water by soil?
|
|
0
|
1469
|
March 24, 2018
|
|
What are the constituents of soil?
|
|
0
|
1336
|
March 24, 2018
|
|
List two harmful effects of soil erosion
|
|
0
|
744
|
March 24, 2018
|
|
What is soil profile? Name the layers found in soil profile
|
|
0
|
782
|
March 24, 2018
|
|
Soil is a home to several animals. Give examples to support this statement
|
|
0
|
2669
|
March 24, 2018
|
|
What is soil erosion? List the agents of soil erosion
|
|
0
|
1067
|
March 24, 2018
|
|
Rahul conducted an experiment to calculate the rate of percolation. He observed that it took 20 minutes for 200 mL of water to percolate through the soil sample. Calculate the rate of percolation
|
|
0
|
1808
|
March 24, 2018
|
|
Razia conducted an experiment in the field related to the rate of percolation. She observed that it took 40 min for 200 mL of water to percolate through the soil sample. Calculate the rate of percolation
|
|
0
|
2385
|
March 24, 2018
|