NSO Level 2- Science Olympiad (SOF) Class 4: Questions 30 - 31 of 165

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Question number: 30

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Appeared in Year: 2016

MCQ▾

Question

Rohit carried out an experiment to test the hardness of objects 1,2 and 3. The results of the experiment are shown here.

Table shows The Scratch Test & Its Result

Table shows The Scratch Test & Its Result

Scratch Test

Results

(i)

Image shows The Scratch Test Image 1

Image Shows the Scratch Test Image 1

Image shows Result Image 1

Image Shows Result Image 1

(ii)

Image shows The Scratch Test Image 2

Image Shows the Scratch Test Image 2

Image shows Result Image 2

Image Shows Result Image 2

(iii)

Image shows The Scratch Test Image 3

Image Shows the Scratch Test Image 3

Image shows Result Image 3

Image Shows Result Image 3

(iv)

Image shows The Scratch Test Image 4

Image Shows the Scratch Test Image 4

Image shows Result Image 4

Image Shows Result Image 4

Which of the following shows the correct order of hardness of 1,2 and 3 starting from the hardest?

Choices

Choice (4)Response

a.

1,2, 3

b.

1,3, 2

c.

2,3, 1

d.

3,1, 2

Question number: 31

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Appeared in Year: 2016

MCQ▾

Question

Two students designed the experiment shown here to study soil erosion. A steady stream of water flows from the faucet into the tray holding sand and gravel. The water forms a channel by eroding some of the sand and gravel. How can the students increase the amount of sand and gravel being eroded?

Image shows The Tray with Sand & Gravel

Image Shows the Tray with Sand & Gravel

Choices

Choice (4)Response

a.

By increasing the water temperature

b.

By adding coarse gravel to the tray

c.

By increasing the tilt of the tray

d.

By reducing the flow of water

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