11.soil erosion

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11.Soil Erosion Time to Answer Full in the blanks.  1.Removal of fertile topsoil is soil erosion.  2.The two natural agents of soil erosion are wind     and water .  3. Large - scale cutting down of forests is known as deforation .  4.plants take nutrients from soil .  Write true or false.  1. Soil conservation is the protection of soil from erosion.  Ans. True 2.Afforestation is large scale cutting down of trees.  Ans. False 3. Power plants are built on rivers to control force of flood water.  Ans. False 4. Overgrazing should be prevented to avoid soil erosion.  Ans. True 5. The practice of terrace farming helps to reduce soil erosion.  Ans. True.    Match the following.  a. Organisms living in soil =soil life b. Earthworm= Farmers friend c. Crop rotation= Improves fertility of soil d. Crop= plants grown by farmers Q4. Short answer type questions a. What is terrace farming?  An...
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IMO 2023-2024

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SOF INTERNATIONAL MATHEMATICS OLYMPIAD
std 3
Chapter 1: Number sense

1. Sneha had a collection of odd number of stickers. Which of the following can be the number of her stickers? 
Ans. 941
Because 941 is odd number

2.which of the following shows CORRECT number name of Mr sharma house number
Ans. Nine thousand five hundred and twenty one

3. Which of the following shows the digit number formed by using the digits 7, 5, 0,2 each only once? 
Ans. (C) 

4 .The greatest four digit even number that can be formed by using the digits 7,0,6,5 without repeating the digits is____
Ans. (C) 
Because 7650 is a greater even number. 

5.which place value will determine the larger number among the given two numbers? 
Ans. (C) 
Because-  ten place number there are greater number 7 and smaller number 3










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