NSO (International Science Olympiad) Class 8 Paper 2012 Part 4 Download All the Papers for 2021 Exam

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Q 26. A Schematic representation of the blood circulation is given . which circulatory parts are incorrectly placed in it.

Representation of Blood Circulation

(A) Right atrium and right ventricle

(B) Left atrium and left ventricle

(C) Pulmonary artery and pulmonary venis

(D) Aorta and vena cava

Q 27. The given figure shows different layer of a forest labelled as W, X, Y and Z. which layer is the habitat of many animal species like monkeys, orangutans, toucans and sloths as there is plenty of food available?

Animal Monkeys, Orangutans, Toucans & Sloths

(A) W

(B) X

(C) Y

(D) Z

Q 28. Namita՚s mother does not allow her to lie on the abdomen immediately after having food. what could most likely be the reason for this?

(A) In stomach food gets processed into a thick liquid called chyme.

(B) Peristaltic movement gets affected throughout the digestive tract especially small intestine where digestion and absorption chiefly occurs hence food does not properly mix with enzymes and stays undigested.

(C) The small intestine on compression releases intestinal juices, which restricts the action of digestive enzymes in the small intestine

(D) The peristaltic movement gets affected thought the digestive tract especially large intestine where poor motility may result in greater absorption of water and thereby may cause diarrhea.

Q 29. Match Column-I with column-II and select the correct option from the codes given below.

Title: Image of Match Clolumn I & Column
Column-IColumn-II
(A) Scouring(I) Wool fibers are passed through rollers to straighten the fibers.
(B) Shearing(II) Unwinding silk fibers from a cocoon
(C) Reeling(III) The Fleece of the sheep along with a thin layer of skin is removed.
(D) Carding(IV) Stained, damaged, or inferior wool is removed.
(V) Sheared hair are washed thoroughly to remove the impurities

(A) (a) - (IV) , (b) - (III) , (c) - (V) , (d) - (I)

(B) (a) - (V) , (b) - (III) , (c) - (II) , (d) - (I)

(C) (a) - (V) , (b) - (III) , (c) - (IV) , (d) - (i)

(D) (a) - (III) , (b) - (II) , (c) - (V) , (d) - (IV)

Q 30. The given figure shows an irrigation method used in agriculture practice.

Irrigation Method in Agriculture Practice

Which of the following is correct regarding this irrigation method?

(A) It is the best technique for watering fruit plants, gardens, and trees.

(B) It is a boon in regions where availability of water is poor.

(C) The method provides water to the plants drop by drop at their roots.

(D) All of these

Q 31. Latika observed her grandmother adding lots of salt on unripe mangoes to prepare pickles. Her grandmother also added excess of oil in the pickle jar. What could be reason for it?

(A) Salt prevents growth of microorganisms by retaining moisture in the food item and oil provides an environment in which microorganisms cannot grow.

(B) Salt prevents growth of microorganisms by forcing them to lose water by osmosis and oil provides an environment in which microorganisms cannot grow.

(C) Salt prevents growth of microorganisms by retaining moisture in the food item and oil prevents their growth by forcing out water from them by osmosis.

(D) Salt prevents growth of microorganisms by forcing them to lose water by osmosis and oil prevents their growth by retaining moisture in the food item.

Q 32. . Look at the given cell carefully. Identify the function of the part labelled ‘y’ .

Cell Carefully Part Labelled

(A) IT controls the movement of material in and out of the cell

(B) It controls all the activities of the cell.

(C) It contains many cell parts.

(D) It provides protection to the cell.

Q 33. Match column-I with column-II and select the correct option from the codes given below.

Title: Table of Match
Column-Icolumn-II
(A) Jim Corbett national park(I) Karnataka
(B) kanha National Park(II) Madhya Pradesh
(C) Kaziranga wildlife sanctuary(III) Tamil Nadu
(D) Bandipur Sanctuary(IV) Uttaranchal
(E) Mudumalai Sanctuary(V) Assam

(A) (a) - (I) , (b) - (III) , (c) - (IV) , (d) - (II) , (e) - (V)

(B) (a) - (v) , (b) - (IV) , (c) - (II) , (d) - (I) , (e) - (III)

(C) (a) - (IV) , (b) - (V) , (c) - (I) , (d) - (III) , (e) - (II)

(D) (a) - (IV) , (b) - (II) , (c) - (V) , (d) - (I) , (e) - (III)

Q 34. Read the given statements and select the correct option.

Statement 1: Aquatic animals produce large number of eggs and sperms necessary to ensure external fertilization.

Statements 2: The egg swims in water with the help of cilia, and fertilize the sperms.

(A) Both Statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

(B) Both Statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

(C) Statement 1 is true but statement 2 is false.

(D) Both statements 1 and 2 are false.

Q 35. Which of these is a behavioral adaptation?

(A) A hognose snake pretends as dead to trick the predator.

(B) A frog՚s light-colored belly makes it harder for a predator.

(C) The scarlet king snake looks very much like the poisonous coral snake.

(D) A treehopper on a leaf or twig resembles a thorn.

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