|
Why is soil erosion relatively less in dense forests as compared to barren, open fields?
|
|
0
|
4647
|
March 24, 2018
|
|
Continuously water-logged soils are disadvantageous for plant growth. Why?
|
|
0
|
1728
|
March 24, 2018
|
|
How can you calculate the absorption of water by soil?
|
|
0
|
1377
|
March 24, 2018
|
|
What are the constituents of soil?
|
|
0
|
1295
|
March 24, 2018
|
|
List two harmful effects of soil erosion
|
|
0
|
707
|
March 24, 2018
|
|
What is soil profile? Name the layers found in soil profile
|
|
0
|
728
|
March 24, 2018
|
|
Soil is a home to several animals. Give examples to support this statement
|
|
0
|
2553
|
March 24, 2018
|
|
What is soil erosion? List the agents of soil erosion
|
|
0
|
1024
|
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
|
1760
|
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
|
2295
|
March 24, 2018
|
|
How is clayey soil useful for crops?
|
|
0
|
10787
|
March 24, 2018
|
|
Locate the following zones given as boxed items in a diagram of soil profile
|
|
0
|
5668
|
March 24, 2018
|
|
Rajasthan is a desert state in India. Once while travelling to Rajasthan by train
|
|
0
|
2667
|
March 24, 2018
|
|
A man digging a pit found that he could dig with ease initially but digging became difficult as he went deeper
|
|
0
|
1651
|
March 24, 2018
|
|
Is it a good practice to remove grass and small plants that are growing in an open, unused field? Give reason to support your answer
|
|
0
|
2252
|
March 24, 2018
|
|
How can a farmer convert acidic soil to neutral soil?
|
|
0
|
4486
|
March 24, 2018
|
|
Which of the following situations ‘A’ or ‘B’ is advantageous for absorption of water and minerals? Why?
|
|
0
|
2371
|
March 24, 2018
|
|
Explain the mechanism of breathing in human beings
|
|
0
|
2689
|
March 24, 2018
|
|
How does gaseous exchange take place in earthworms , fish?
|
|
0
|
1862
|
March 24, 2018
|
|
Distinguish between the following. Breathing and Respiration
|
|
0
|
3643
|
March 24, 2018
|
|
List the similarities and differences between aerobic and anaerobic respiration
|
|
0
|
7090
|
March 24, 2018
|
|
Observe the figures given as (A) and (B) and answer the following
|
|
0
|
2228
|
March 24, 2018
|
|
A food stall owner was preparing dough for making bhaturas
|
|
0
|
14165
|
March 24, 2018
|
|
Observe the figure given below carefully and answer the following questions.Which process is being tested in the activity?
|
|
0
|
5342
|
March 24, 2018
|
|
Observe the figure given below carefully and answer the following questions
|
|
0
|
2421
|
March 24, 2018
|
|
Paheli participated in a 400 m race competition held at her school and won the race
|
|
0
|
9601
|
March 24, 2018
|
|
Explain respiration in plants
|
|
0
|
618
|
March 24, 2018
|
|
What facilitates opening and closing of stomatal pores?
|
|
0
|
807
|
March 24, 2018
|
|
Explain the process of breathing in fish
|
|
0
|
2292
|
March 24, 2018
|
|
How do frogs breathe on land and in water?
|
|
0
|
3563
|
March 24, 2018
|