National Science Olympiad Forum By SOF Olympiad Trainer

D Murari from Indian School of Excellence, Bangalore

Subject :NSO Class : Class 5

In a lever the fixed point around which the rod moves is called_______.

A Effort
B Load
C Pulley
D Fulcrum

Ans 1:

somesh from Centre point katol road, Nagpur

Class : Class 6

fulcrum is a fixed point/dot on which the lever balances

Ans 2:

somesh from Centre point katol road, Nagpur

Class : Class 6

Ans 3:

Sarah Nawalkar from Rajhans Vidhyalaya, Mumbai

Class : Class 5

my answer was a got 3/5

Ans 4:

Sanchit Nayak from Green field school, Delhi

Class : Class 5

D

Ans 5:

Pratham Dave from GNS, Bangalore

Class : Class 7

Ans 6:

SHUBHANI LAKHERA from ANN MARY SCHOOL, Dehradun

Class : Class 5

D

Ans 7:

Saanvi Prasad from DPS Noida, Noida

Class : Class 5

My answer is D!!

Ans 8:

sarah pranav gothivarekar from Indian School Al Gubra, Muscat

Class : Class 4

my answer is d and I got 5/5

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Shaurya Shinde from Goldcrest High Vashi, Navi Mumbai

Subject :NSO Class : Class 5

Refer to the given graph which shows changes in temperature at two places X and Y over the year and answer the following questions.

The animals living at Y should be having adaptations like ________.

A Reduced sweating
B Thick layer of fur
C Ability to easily climb up and down trees.
D Gills to breathe underwater.

The book says that the correct answer is 'a' but online it shows the correct answer as'b'.

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Ans 1:

Diksha Mishra from Bal Bharti Public School, Ghaziabad

Class : Class 7

As the temperature at Y is less do the place is cold and animals in cold places have thick layer of fur.

Ans 2:

SANVI ROHILLA from The little shri, Rohtak

Class : Class 5

As the Temperature at Y is less So the place is cold and Animals in cold places have thick layer of fur

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Aria Routray from V S Vidyalaya , Sunabeda

Subject :NSO Class : Class 5

Three similar cages containing same number of pollution sensitive fish X were placed in three different ponds (R, S and T). The given graph shows the change in the number of fish in three cages over time.

According to the given graph which pond is most polluted (I) and which pond has the highest concentration of dissolved oxygen in the water (II)?

A
B
C
D

B

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Ans 1:

Arin from suncity, gurugram

Class : Class 8

ans b

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Aria Routray from V S Vidyalaya , Sunabeda

Subject :NSO Class : Class 5

Radha carried out an experiment to find out how fast water can pass through three different types of soil. She set up the experiment as shown below. Using a stop watch, she measured the time taken for 20mL of water to pass through each type of soil.

She recorded the results as shown below:

Identify soils X, Y and Z and select the correct option regarding them.

AY type of soil is usually found in deserts.
BPotters use X type of soil to make pots.
CSoil Z contains nutrients and humus in right proportion which makes it suitable for growth of most plants.
DAll of these

D

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Ans 1:

Arin from suncity, gurugram

Class : Class 8

ans d

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R SAI HARSHIL from HILLSIDE SCHOOL, Hyderabad

Subject :NSO Class : Class 4

Refer to the given graph showing temperature changes at a place over a year. Select the correct option regarding it.

A At time P, one should wear a sweatshirt and woollen pants.
B At time Q, one should wear muffler and woollen gloves.
C At time R, one should wear shorts and cotton t-shirt.
D None of these

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Ans 1:

Kriti Bhonsale from Delhi Public School, Bengaluru

Class : Class 5

i think it is ACAN SOMEONE PLS TELL THE CORRECT ANSWER?

Ans 2:

Ibrahim Aslam from uttam, Ghaziabad

Class : Class 5

D is the best answer

Ans 3:

Aayman from DPS NOIDA, Noida

Class : Class 4

This question ****s

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Dhyey Mehta from Pawar Public School, Dombivali

Subject :NSO Class : Class 7

Refer to the given figure showing three parent species, X, Y and Z (in plot I) and their respective seedlings after dispersal (in plot II).

Select the incorrect statement regarding species X, Y and Z.
(i) X could be pea plant in which fruits burst open forcibly after drying.
(ii) Y could be Xanthium in which seeds are hooked i.e., have spines.
(iii) Z could be Acer in which fruits and seeds have wings or hair like structure.
(iv) X could be coconut, Y could be lotus and Z could be Calotropis.

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

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Ans 1:

Antareep Mukherjee from New Horizon Public School, Bangalore

Class : Class 8

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Syed Mohammad Hussain from ISAM, Muscat

Subject :NSO Class : Class 5

Cutting down of trees in large numbers is called why this quesṭion answer wrong by SOF. My Answer is deforestation but SOF Olympiad answer is afforestation , WHy ? There are many more question which answer is wrong by SOF Olympiad

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nishka Alpesh Lad from U S Ostwal English Academy, Mumbai

Subject :NSO Class : Class 7

Raghav categorised the following household items into acids and bases.

Acids	Bases
1.Lemon	4.Baking soda
2.Antacid	5.Vinegar
3.Tea	6.Curd

Which of them are placed under the wrong category?

A 3 and 5
B 2 and 6
C 3, 4 and 5
D 2, 5 and 6

View All Answers (3)

Ans 1:

Siddharth from DPS, Jodhpur

Class : Class 9

Ans 2:

Nivriti from Euro, Mumbai

Class : Class 8

answer is D

Ans 3:

Antareep Mukherjee from New Horizon Public School, Bangalore

Class : Class 8

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Satyam Pandey from radiant, danapur

Subject :NSO Class : Class 7

Kunal took few iron turnings and mixed them well with sulphur powder. He could separate the iron turnings with the help of a magnet. He heated the mixture for some time and tried to separate the iron turnings with the magnet but he could not. Why?

A On heating, a chemical change takes place and a new compound is formed.
B On heating, iron becomes non-magnetic hence, it is not attracted by magnet.
C On heating, a physical change takes place hence iron and sulphur gets mixed up.
D On heating, iron evaporates and only sulphur is left behind.