National Science Olympiad Forum By SOF Olympiad Trainer - Page 608

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
Penguin and ostrich are birds(aves) while a bat is a mammal. Thus, a bat has hair on its skin. An ostrich has feathers on its skin. A penguin has very little or no feather on it so as to make itself streamlined to be able to swim easily.

Ans 2:

Class : Class 10

Ans 3:

Class : Class 7
Hippo, whale and cow have skin covering.

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 9
D

Ans 2:

Class : Class 6

Ans 3:

Class : Class 7
I think it is C becuse mosquitoes andleeches suck blood but a butterfly such nectar. Or it can be B.

Ans 4:

Class : Class 8
I think ans B as Hyena is a scavenger and others are predators...

Ans 5:

Class : Class 8

Ans 6:

Class : Class 3
I think B is the correct answer because mosquitos and leeches suck blood that they get from humans and animals but butterflies eat nectar that they get from plants

Ans 7:

Class : Class 8
Answer is B because hyena is a scavenger, others are carnivores

Ans 8:

Class : Class 7

Ans 9:

Class : Class 8

Ans 10:

Class : Class 4

Ans 11:

Class : Class 1

Ans 12:

Class : Class 8
The answer is option (d) becausei) cows , buffaloes and goats have their food in the same manner called chewing the cud.ii) Lions , wolves and hyena have their food in the same manner called tearing the flesh.iii) Butterflies, mosquitoes and leeches have their food in the same manner called sucking the food.Hence the correct answer is option (d)

Ans 13:

Class : Class 8
Correct answer is B

Ans 14:

Class : Class 3
answer is d !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!11

Ans 15:

Class : Class 3
The correct ans is D

Ans 16:

Class : Class 4
I think right answer will be B as hyena is a scavenger but others are carnivores

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 9
ojoo;j 9pu i jp[yuj7u\ p i[u0y7h'p/ 00ujy7mb[o

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
It should be wool I even looked it up on the internet. It should be wool!

Ans 2:

Class : Class 8
Smell of burning silk is charred meat, where as smell of burning wool is as burned hair. So answer should be (D).

Ans 3:

Class : Class 6
wooooooooooooooooooooooooooooooooooooooooooooooooooooool

Ans 4:

Class : Class 9
SOF Master Answer Please explain . The answer should be WOOL

Ans 5:

Class : Class 8
Yes the answer should be wool

Ans 6:

Class : Class 6
woolwooolwoooooooooooooool

Ans 7:

Class : Class 9
wooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooollllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll

Ans 8:

Class : Class 7
c is correct as the question is saying of pure fabric so the ans. should be c google --(Silk is formed of animal protein secretion of silkworms. Hence , when burnt it smells like hair , which is also composed of animal protein.

Ans 9:

Class : Class 6
WOOOOOOOOOOOOOOOOOOOL

Ans 10:

Class : Class 6
wool.wool.wool.wool.wool.

Ans 11:

Class : Class 3
It should be wool. The smell of silk is charred meat.

Ans 12:

Class : Class 8
Silk smells like charred meat

Ans 13:

Class : Class 8
Wool

Ans 14:

Class : Class 9
It should be wool. D is the correct answer.

Ans 15:

Class : Class 6
wooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooool

Ans 16:

Class : Class 7
Exactly, silk smells like charred meat...and wool smells like burning hair.

Ans 17:

Class : Class 6

Ans 18:

Class : Class 7

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 6

Ans 2:

Class : Class 7
no 9

Ans 3:

Class : Class 4
PLEASE explain why the answer is 9 and not 11.

Ans 4:

Class : Class 8
I think there are 9 food chains at all. Please check the diagram of the food web.

Ans 5:

Class : Class 7
11

Ans 6:

Class : Class 3

Ans 7:

Class : Class 9
11 is correct acd acdi acde acdef acdefg acdeg hcdef hcde hcdeg hcd hbg

Ans 8:

Class : Class 3
Study the given food web and select the correct option for the following questions. How many food chains are there in the food web? A 9 B 11 C 13 D 16ans is c

Ans 9:

Class : Class 5
ans 9

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8

Ans 2:

Class : Class 3
Cobalt, Nickel, and Steel are magnetic materials. But Stainless Steel is non-magnetic. There are several different types of stainless steel. The two main types are austenitic and ferritic. Ferritic stainless steels are generally magnetic, while austenitic stainless steels usually are not. Austenitic stainless steel is stainless steel added with nickel. so, the correct answer is Option D.

Ans 3:

Class : Class 9
the answer is D

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Subject :NSO    Class : Class 1

Ans 1:

Class : Class 2
answer should be B . Plant cannot die in absence of 1 food

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 9

Ans 2:

Class : Class 6
a

Ans 3:

Class : Class 6
a

Ans 4:

Class : Class 4
aswer a jojojojojojojojojojojooojojjjjjojjojjjojoojjjooooojjjjjjjoooojjojojojojojojoo

Ans 5:

Class : Class 9

Ans 6:

Class : Class 8
Metal P expands less then Q and metal Q expands less than R. So, metal P expands less than R. If a bimetallic strip is heated it bends with metal which expands more on the outside and the metal which expands less in the inside. So the strip should bend downwards to complete the circuit for the bell to ring.Answer- A.

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