National Science Olympiad Forum By SOF Olympiad Trainer - Page 59

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Subject :NSO    Class : Class 5

Jayesh bought three different kinds of fish, P, Q and R. He put fish P population and fish Q population into tank X, and fish P population and fish R population into Y. He recorded the number of each fish in each tank for a week. There were no dead fish in the tank when he checked every day. The graphs below show the results at the end of the week.

Which of the following shows the prey-predator relationship between the three fishes?

AP → Q → R
BQ → P → R
CR → P → Q
DQ → R → P


They should give pictures correctly. Right?

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 3

A metallic container has a capacity of 2.5 litres. 3 litres of air is pumped into it.
What will be the volume of air inside the metallic container?

A1.5 litres
B2 litres
C2.5 litres
D3 litres


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Subject :NSO    Class : Class 8

Which of the following statements holds true about the kind of fertilisation as shown in the given figure?


A The female lays hundreds of gametes.
B The female gametes are laid directly on the cluster of floating male gametes.
C The male gametes are immobile whereas female gametes can swim in water with the help of long tail.
D Zygote receives chromosomes unequally from the parents, depending upon the number of gametes present in water.


female lays eggs not gametes

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Subject :NSO    Class : Class 7

Observe the given Venn diagram carefully and identify the processes represented by points 1, 2 and 3.


1 2 3
A Burning of fossil fuel Boiling potatoes Baking a cake
B Lighting a kerosene stove Breaking of an egg shell Photosynthesis
C Burning of paper Rusting of iron Spoilage of food
D Burning of LPG gas in kitchen Crystallisation of copper sulphate Browning of cut slices of apple


how can a physican and chemical change occur in one change only ?

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Subject :NSO    Class : Class 10

Identify the endocrine glands L, M and N in the given figure and select the option that correctly matches them with the function of hormone released by them.

  L M N
A Stimulates
synthesis
of melanin
in skin
Controls
rate of
metabolism
Stimulates
development
of lymphocytes
B Lowers
blood calcium
level
Regulates
circadian
rhythm
Controls
rate of
cellular oxidation
C Controls
rate of
metabolism
Helps in
milk ejection
from mammary
glands
Regulates water
and mineral
balance
in body
D Increases
blood
calcium
level
Stimulates
development
of secondary
sexual characters
in males and
females
Induces
contractions
of uterus
during child
birth


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Subject :NSO    Class : Class 10

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Subject :NSO    Class : Class 10

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Subject :NSO    Class : Class 10

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