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Subject :NSO    Class : Class 6

A scientist conducted a study on four different species of organisms (W, X, Y and Z) that are related in an aquatic food chain. He estimated the total number of individuals in the population of each species and the average biomass of each individual.


Which of the following shows the correct relation of these species in a food chain?

AZ → Y → W → X
BX → W → Z → Y
CX → W → Y → Z
DZ → W → X → Y


Answer should be ABecause Z is eaten by Y, Y should be eaten by W and W should be eaten by X (looking at the biomass and number of individuals)

Ans 1: (Master Answer)

Class : Class 1

A


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Subject :NSO    Class : Class 6

Equal sized square pieces of three different fabrics X, Y and Z were taken and spread out on a floor. Three small similar metal balls were each rolled with equal force from one end diagonally to the other end of fabric piece. Time taken by the balls to reach other end of fabric was noted to be as follows:


Now, select the correct option regarding this.

AFabric Z can be obtained from seeds of a plant and fabric Y can be obtained from stem of a plant.
B Fabric Z can be obtained from the stem of a plant and fabric Y can be obtained from larva of an animal.
CFabric Y can be obtained from the fur of an animal and fabric X can be obtained from larva of an animal.
DFabric Y can be obtained from the fur of an animal and fabric Z can be obtained from larva of an animal.


Correct answer is BBecause Z should be a little rough and Y (silk) should be the smoothest

Ans 1:

Class : Class 7

Ans 2:

Class : Class 7
The answer should be BBecause Z should be rough and Y should be the smoothest (silk)

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1

B

Comets are balls of ice and dust that move around the Sun in highly elliptical orbits.


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Subject :NSO    Class : Class 1

Ans 1: (Master Answer)

Class : Class 1

A

Plants are the living things which take up nutrients from soil (non-living thing).


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Subject :NSO    Class : Class 8

The given diagram shows a respirometer that is used to measure gaseous exchange in pea seeds. The apparatus is maintained at a constant temperature.


Which of the following is incorrect regarding this?

AThe gas pressure in X will fall as O2 is absorbed during respiration and CO2 is absorbed by potassium hydroxide solution.
BThe fluid level at Y will fall to compensate the loss of pressure in X.
CThe gas pressure at X will rise as O2 is given out by seeds and CO2 is released by potassium hydroxide solution.
DThe fluid level at Z will rise due to loss of pressure at X.


Ans 1: (Master Answer)

Class : Class 1

C


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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
d is correct

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5

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Subject :NSO    Class : Class 9

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