National Science Olympiad Forum By SOF Olympiad Trainer

Advik Mishra from CHIREC, Hyderabad

Subject :NSO Class : Class 4

Refer to the given Venn diagram and select the correct option.

A P could be sparrow whereas Q could be bat.
B P could be snake whereas Q could be frog.
C P could be bat whereas Q could be penguin.
D P could be lizard whereas Q could be dolphin.

why not d

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Parth Dhondiram Gadgile from Narayana international school Loha Dist. Nanded, Parbhani

Subject :NSO Class : Class 8

Which of the following statements are correct regarding the image formation of a real object by a concave lens?
(i) The nature of image does not change much with the change in the object distance.
(ii) Always a virtual image is formed.
(iii) The image is larger than the object in size.
(iv) Image is never formed between the optical centre and the focus.

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

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Reyansh Modumudi from Skill stork international school, Warangal

Subject :NSO Class : Class 5

Unscramble the given letter groups to find the name of body covering that helps to protect reptiles in their habitat.

A TCELIUC
B ELSSAC
C IPSENS
D FRSEATHE

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ShubhamThakur from Saraswati shishu vidya mandir sec 2-A, Bokaro

Subject :NSO Class : Class 10

Identify the given developmental stage of human embryo and select the correct option regarding it.

ADevelopmental stage- Blastocyst; Site of implantation- Uterine wall
BDevelopmental stage- Morula; Site of implantation- Uterine wall
CDevelopmental stage- Blastula; Site of implantation- Mid part of Fallopian tube
DDevelopmental stage- Gastrula; Site of implantation- Mid part of Fallopian tube

Please explain

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Mishika Nair from Rajagiri public school, Qatar

Subject :NSO Class : Class 4

Unscramble the letters to find the name of a non-contact force.

A LANIOTCFIR EFROC
B RALCUMUS REFCO
C LANOITATIVARG EROFC
D TICSEAL REOFC

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Ans 1:

Aarvi Gosai from The New Tulip International School, Ahemdabad

Class : Class 4

Ans 2:

Aarvi Gosai from The New Tulip International School, Ahemdabad

Class : Class 4

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Prabhat from phoenix greens, hyderabad

Subject :NSO Class : Class 7

In the given apparatus, air is inhaled and exhaled through tube P. Tubes X and Y are closed subsequently at different times.

What will happen when
(i) Tube X is closed with a clip and air is exhaled ?
(ii) Tube Y is closed with a clip and air is exhaled ?

A(i)-Lime water in tube A will turn more milky, (ii)-Lime water in tube B will turn less milky
B(i)-Lime water in tube A will turn less milky, (ii)-Lime water in tube B will turn more milky
C(i)-Lime water in tube B will turn more milky, (ii)-Lime water in tube A will turn more milky
D(i)-Lime water in tube B will turn less milky, (ii)-Lime water in tube A will turn more milky

very beautuful question

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Ans 1:

Prabhat from phoenix greens, hyderabad

Class : Class 7

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Vanij from Sanskriti School, Pune

Subject :NSO Class : Class 4

Given below are figures of four types of forces. Match the images with their corresponding descriptions and choose the correct option.

(1) This force pulls everything towards the Earth.
(2) This force opposes motion between two surfaces.
(3) This force is generated by muscle action.
(4) This force helps an object return to its original shape after being deformed.

A a-3, b-4, c-2, d-1
B a-2, b-1, c-4, d-3
C a-4, b-3, c-1, d-2
D a-4, b-3, c-1, d-2

Bruh, C and D have the same options

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Ans 1:

Nakul Chethan from First steps Jakkur , Bangalore

Class : Class 4

You are right ✅️

Ans 2:

Vanij from Sanskriti School, Pune

Class : Class 4

Chat box to me self!?!?!?!?

Ans 3:

Aarvi Gosai from The New Tulip International School, Ahemdabad

Class : Class 4

and no Vanji the chat box isn't for yourself anymore

Ans 4:

Vanij from Sanskriti School, Pune

Class : Class 4

Bruh, C and D have the same options. I have posted an error in this. So, I want others also to have a look at this

Ans 5:

Aarvi Gosai from The New Tulip International School, Ahemdabad

Class : Class 4

These Olmpiad people are CHEATERS! >:(

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Avaneesh Barithaya from New Horizon Scholars School Vasant Lawns, Thane

Subject :NSO Class : Class 5

Refer to the given figures showing joints labelled as W, X, Y and Z. Descriptions of these joints are given. One of the descriptions about these joints is incorrect. Identify the incorrect description and select the statement that accurately corrects the mistake.

W : Found in the elbow and knee, allows movement in only one direction.
X : Found in the shoulder and hip, enables movement in all directions.
Y : Located between the first two vertebrae, allows head to turn sideways.
Z : Present in the wrist and ankle, permits only back-and-forth motion.

A Z : Present in the wrist and ankle, allows both back-and-forth and side-to-side movement.
B X : Found in the shoulder and hip, does not allow movement in all directions.
C W : Found in the elbow and knee, movement is not strictly limited to one direction.
D Y : Located between the first two vertebrae, allows the head to rotate fully.

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Aarav Kumar Panda from Mother's Public School, Bhubaneswar

Subject :NSO Class : Class 6

Read the following statements.
(I) Stars appear to move from east to west.
(II) The solar system consists of eight planets and is a host of asteroids, comets and meteors.
(III) The earth revolves around the sun in an elliptical orbit.
(IV) Pluto is also a planet.
Which of the given statement(s) is/are correct?

A I and III only
B II and III only
C I only
D II and IV only