Physical and Chemical Changes [NSO Level 1- Science Olympiad (SOF) Class 7]: Questions 1 - 5 of 48

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Question number: 1

» Physical and Chemical Changes

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MCQ▾

Question

Which of the following is most reactive metallic element in nature?

Choices

Choice (4)Response

a.

Magnesium (Mg)

b.

Potassium (K)

c.

Calcium (Ca)

d.

Sodium (Na)

Question number: 2

» Physical and Chemical Changes

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MCQ▾

Question

Refer the given figure. It depicts

Given Figure Depicts

Given Figure Depicts

Choices

Choice (4)Response

a.

Symbiotic nutrition

b.

Saprotrophic nutrition

c.

Parasitic nutrition

d.

Autotrophic nutrition

Question number: 3

» Physical and Chemical Changes

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MCQ▾

Question

Refer the given figure. What does it represent?

The structure labelled X and Y

The Structure Labelled X and Y

Choices

Choice (4)Response

a.

Symbiotic mode of nutrition as both the organisms X and Y are being benefited in the process.

b.

Predatory mode of nutrition as organism X is being eaten by the organism Y.

c.

Parasitic mode of nutrition because the organism X is being harmed by organism Y.

d.

Autotrophic mode of nutrition as the organism Y is obtaining food for itself.

Question number: 4

» Physical and Chemical Changes

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MCQ▾

Question

Different types of teeth

Different Types of Teeth

The given figures show different types of teeth. Which of these is used for taking bites of food?

Choices

Choice (4)Response

a.

X

b.

W and Y

c.

W

d.

Y and Z

Question number: 5

» Physical and Chemical Changes

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MCQ▾

Question

Read the given statements.

  1. Paramecium has contractile vacuoles which carry out (i) . To expel water from cell, to compensate for fluid absorbed by (ii) from its surroundings.

  2. Hydra has (iii) ability hence they do not die of old age.

  3. An amphibian that uses its long, sticky tongue to catch insects; (iv) .

  4. Mosquitos use tube like mouthparts, called (v) to consume blood of animals.

Select the option which correctly fills the blanks in any two of these statements.

Choices

Choice (4)Response

a.

(iii) Frog; (iv) Pseudopodia.

b.

(ii) Regenerative; (iii) Snake.

c.

(ii) Regenerative; (iv) Proboscis.

d.

(i) Thermoregulation & osmosis; (iii) Crocodile.

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