NSO Level 1- Science Olympiad (SOF) Class 8: Questions 709 - 713 of 1076

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Passage

Rutu took two paper cones A and B and poured some water in A. Then she heated both the cones as shown in figure. Observe the picture and answer the questions

Image of two Cone Paper

Image of Two Cone Paper

Image of two Cone Paper

Question number: 709 (1 of 4 Based on Passage) Show Passage

» Combustion and Flame

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MCQ▾

Question

When she continue heating the cone A, water in the cone changes to vapour and finally it dries up and the cone begins to burn. Explanation for this fact is

Choices

Choice (4) Response

a.

Paper cone attains ignition temperature and start burning.

b.

Water boils and changes to vapour

c.

Paper passes heat to water by conduction.

d.

All a. , b. and c. are correct

Question number: 710 (2 of 4 Based on Passage) Show Passage

» Combustion and Flame

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MCQ▾

Question

When she tries to burn the paper cones, which cone will burn first?

Choices

Choice (4) Response

a.

Cone A

b.

Cone A and B will burn together

c.

Cone B

d.

Cone A and B will not burn

Question number: 711 (3 of 4 Based on Passage) Show Passage

» Combustion and Flame

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MCQ▾

Question

What does she observe when she continue heating the cone A?

Choices

Choice (4) Response

a.

Water in the cone changes to vapour and finally it dries up.

b.

The cone begins to burn.

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

Question number: 712 (4 of 4 Based on Passage) Show Passage

» Combustion and Flame

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MCQ▾

Question

When she tried to burn the cones, she observed that cone B burnt first and cone A took a long time. How will you explain this situation?

Choices

Choice (4) Response

a.

The ignition temperature of A is less than that of B

b.

The ignition temperature of B is less than that of A

c.

The ignition temperature of both A and B are same

d.

The ignition temperature of a substance do not have any relation with burning

Question number: 713

» Reproduction in Animals

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MCQ▾

Question

Though the mother gives birth to young ones, sometimes the babies look exactly like father. The reason is

Choices

Choice (4) Response

a.

An offspring is developed after the union of male and female gametes.

b.

Male gamete called sperm consists of the characters and features of father and female gamete called ovum contains the characters and features of mother.

c.

The baby perform characters and features of either mother or father but the other’s characters are hidden in him.

d.

All a. , b. and c. are correct

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