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Secondary School (English Medium) (5 to 8) इयत्ता ७ - CBSE Question Bank Solutions for Science

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Why do we get instant energy from glucose?

[2] Nutrition in Animals
Chapter: [2] Nutrition in Animals
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Which part of the digestive canal is involved in:

Absorption of food ______.

[2] Nutrition in Animals
Chapter: [2] Nutrition in Animals
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Which part of the digestive canal is involved in:

Chewing of food ______.

[2] Nutrition in Animals
Chapter: [2] Nutrition in Animals
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Which part of the digestive canal is involved in:

Killing of bacteria ______.

[2] Nutrition in Animals
Chapter: [2] Nutrition in Animals
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Which part of the digestive canal is involved in:

Complete digestion of food ______.

[2] Nutrition in Animals
Chapter: [2] Nutrition in Animals
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Which part of the digestive canal is involved in:

Formation of faeces ______.

[2] Nutrition in Animals
Chapter: [2] Nutrition in Animals
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Match the items of Column I with suitable items in Column II.

  Column I   Column II
(a) Salivary gland (i) Bile juice secretion
(b) Stomach (ii) Storage of undigested food
(c) Liver (iii) Saliva secretion
(d) Rectum (iv) Acid release
(e) Small intestine (v) Digestion is completed
(f) Large intestine (vi) Absorption of water
    (vii) Release of faeces
[2] Nutrition in Animals
Chapter: [2] Nutrition in Animals
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Label the following figure of the digestive system.

A part of the human digestive system

[2] Nutrition in Animals
Chapter: [2] Nutrition in Animals
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Seed dispersal takes place by means of ______, ______ and ______.

[8] Reproduction in Plants
Chapter: [8] Reproduction in Plants
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Describe the various ways by which seeds are dispersed.

[8] Reproduction in Plants
Chapter: [8] Reproduction in Plants
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An image formed by a concave ______ cannot be obtained on a screen.

[11] Light
Chapter: [11] Light
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A concave lens always forms a virtual image.

[11] Light
Chapter: [11] Light
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A real image cannot be obtained on a screen.

[11] Light
Chapter: [11] Light
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State two differences between a convex and a concave lens.

[11] Light
Chapter: [11] Light
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Which type of lens forms always a virtual image?

[11] Light
Chapter: [11] Light
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Given below from (i) to (iv) are some food items.

  1. Boiled and mashed potato
  2. Glucose solution
  3. A slice of bread
  4. Mustard oil

Which of the above will give a blue-black colour when tested with iodine?

[2] Nutrition in Animals
Chapter: [2] Nutrition in Animals
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Read carefully the terms given below. Which of the following set is the correct combination of organs that do not carry out any digestive functions?

[2] Nutrition in Animals
Chapter: [2] Nutrition in Animals
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The enzymes present in the saliva convert ______.

[2] Nutrition in Animals
Chapter: [2] Nutrition in Animals
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Cud is the name given to the food of ruminants which is ______.

[2] Nutrition in Animals
Chapter: [2] Nutrition in Animals
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Choose the correct order of terms that describes the process of nutrition in ruminants.

[2] Nutrition in Animals
Chapter: [2] Nutrition in Animals
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