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Saikrishna Nandakumar from Shishya BEML Public School, BANGALORE
Subject :NSO    Class : Class 6

In order to find out the rate of decomposition of three types of solid waste, X, Y and Z, scientists dumped these wastes in a restricted open low lying area. The given graph shows the rate of decomposition of these wastes. Which of the following correctly identifies X, Y and Z?


AX-Wooden chair, Y-Fruit peel, Z-Syringe
BX-Plastic tumbler, Y-Iron nail, Z-Wrist watch
CX-Metal bangles, Y-Cotton shirt, Z-Cooked beans
DX-Animal excreta, Y-Newspaper, Z-Wooden box


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Saikrishna Nandakumar from Shishya BEML Public School, BANGALORE
Subject :NSO    Class : Class 6

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Sidharth V from Hindustan International School, Chennai
Subject :NSO    Class : Class 2

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Rangnath sharma from MOUT LITERA ZEE SCHOOL, PATNA
Subject :NSO    Class : Class 7

Given below are the four food components (P-S) and their corresponding sources.
P meat, fish, eggs
Q butter, ghee, margarine
R bread, biscuits, potatoes
S amla, tomato, orange
Select the incorrect statement regarding them.

ADeficiency of P causes Marasmus in children and Kwashiorkor only in adults.
BAmongst P, Q, R and S, 1 gram of Q produces the maximum energy.
CExcess of R gets stored in body cells, and is used for production of energy, whenever required.
DDeficiency of S leads to a disease, in which gums swell up and bleed.


budu

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Rangnath sharma from MOUT LITERA ZEE SCHOOL, PATNA
Subject :NSO    Class : Class 7

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Rangnath sharma from MOUT LITERA ZEE SCHOOL, PATNA
Subject :NSO    Class : Class 7

Ans 1:

Rangnath sharma from MOUT LITERA ZEE SCHOOL, PATNA
Class : Class 9

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Avn lakshmi from Bvbarra, Hyderabad
Subject :NSO    Class : Class 7

Observe the given figure carefully.

Read the given passage and fill in the blanks by selecting an appropriate option. In the given figure, __(i)__ reaction takes place which is a chemical change. __(ii)__ being more reactive than __(iii)__ produces gas 'X' which is __(iv)__ and it burns with a __(v)__ .

(i) (ii) (iii) (iv) (v)
A Oxidation Zn H SO2 dazzling light
B Displacement H Zn H2 pop sound
C Displacement Zn H H2 pop sound
D Reduction Zn S SO2 rotten egg
smell


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Avn lakshmi from Bvbarra, Hyderabad
Subject :NSO    Class : Class 7

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Avn lakshmi from Bvbarra, Hyderabad
Subject :NSO    Class : Class 7

A large area of forest was cleared by burning. Which of the following statements is/are correct regarding the consequences of this activity?
(i) Increase in soil erosion as soil is directly exposed to wind and rain.
(ii) The land will have more fresh air as there are lesser trees to take in oxygen.
(iii) Wildlife will easily thrive in the cleared area because more space is available now.
(iv) New trees will grow faster and replace the burnt forest soon as the ash of the burnt trees will make the soil more fertile.

A(i) only
B(i) and (iv) only
C(i), (ii) and (iv) only
D(i), (ii), (iii) and (iv)


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Avn lakshmi from Bvbarra, Hyderabad
Subject :NSO    Class : Class 7

Refer to the given graph representing temperature gradient through different regions of Earth.

Identify labelled parts P-S and select the correct statement regarding them.

AAnimals inhabiting S possess blubber.
BAnimals inhabiting R may have small body appendages to reduce the exposed surface area.
CAnimals inhabiting P do not drink water and use only metabolic water to fulfill their water requirements.
DAnimals inhabiting Q undergo aestivation whereas animals inhabiting S undergo hibernation.


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