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CBSE 7th Standard Science Heat Model Questions Papers Study Material - QB365 Set B

Published on: 31/10/2025

Question Set B

CBSE 7th Standard Science Heat Model Questions Papers Study Material - QB365

Download CBSE Class 7th Standard CBSE Science question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 7th Standard CBSE Science

Questions + Answers key

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QB365 Student Learing Managemnet System

Std: 7th Standard CBSE - Science

chapter: Heat - Model Questions Papers

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Questions:

Match the following

5 x 1 = 5

Cells

Sea breeze blows during

Camel

Rectum

Amarbel

True or False

8 x 1 = 8

Mucus protects the stomach lining from damage.

(a)

False

(b)

True

The large intestine is longer and wider than the small intestine of the human alimentary canal.

(a)

True

(b)

False

Tongue is attached to the roof of the mouth cavity at the back

(a)

True

(b)

False

Our sense of touch about hotness or coldness is not always reliable

(a)

False

(b)

True

10.

The rearing of silkworms for obtaining silk is called silviculture.

(a)

True

(b)

False

11.

Ruminant can digest cellulose (carbohydrate).

(a)

False

(b)

True

12.

Pitcher plant eats insects.

(a)

False

(b)

True

13.

The product of photosynthesis is not a protein.

(a)

False

(b)

True

Multiple Choice Question

5 x 1 = 5

14.

Two organisms are good friends and live together. One provides shelter, water and nutrients while the other prepares and provides food. Such an association of organisms is termed as

(a)

saprophyte

(b)

parasite

(c)

autotroph

(d)

symbiosis

15.

When we observe the lower surface of a leaf through a magnifying lens, we see numerous small openings. Which of the following is the term given to such openings?

(a)

Stomata

(b)

Lamina

(c)

Midrib

(d)

Veins

16.

If iodine is dropped on the boiled leaf it gives blue-black colour due to the presence of

(a)

starch

(b)

protein

(c)

fat

(d)

vitamin

17.

Organisms which prepare food for themselves using simple naturally available raw materials are referred to as

(a)

heterotrophs

(b)

autotrophs

(c)

parasites

(d)

saprophytes

18.

Plants take carbon dioxide from the atmosphere mainly through their

(a)

roots

(b)

stem

(c)

flowers

(d)

leaves

Fill up / 1 Marks

5 x 1 = 5

19.

Leaves are called the _____________ of plants.

20.

__________________ plants derive their nutrient from dead and decaying animals or plants.

21.

Cud chewing animals are called ______

22.

Animals are ______

23.

Large intestine absorbs _____ and ______ from undigested food.

Generic 5

5 x 5 = 25

24.

Complete the paragraph related to the history of silk moth by filling in the blanks.
The_______(a)________silk moth lays_______(b)__________, from which hatch _______(c)_______called_______(d)_________or________(e)_______.They grow in size and when caterpillar is ready to enter the next stage of its life history called ________(f)_______, it first weaves a covering to hold itself, which is known as________(g)_________..

25.

Explain the phrase - "Unity is Strength" on the basis of the making of fabric from fibre.

26.

Explain the rearing of silkworms.

27.

Give a brief account of wool manufacturing.

28.

Compare the burning characteristics of cotton, nylon, silk and wool.

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Answers Key:

Match the following

5 x 1 = 5

()
Structural units of bodie.

()
Day

()
Fur

()
Release of faeces

()
Parasite

True or False

8 x 1 = 8

(a)
False

(b)
False

(b)
False

(a)
False

10.

(b)
False

11.

(a)
False

12.

(a)
False

13.

(a)
False

Multiple Choice Question

5 x 1 = 5

14.

(a)
saprophyte

15.

(a)
Stomata

16.

(a)
starch

17.

(b)
autotrophs

18.

(d)
leaves

Fill up / 1 Marks

5 x 1 = 5

19.

()
food factory

20.

()
Saprophytic

21.

()
ruminants

22.

()
heterotrophic

23.

()
water, salts

Generic 5

5 x 5 = 25

24.

(a) female
(b) eggs
(c)larvae
(d) caterpillars
(e) silkworms
(f) pupa
(g) cocoon

25.

Fibres and fabric play a large role in everyday application. A fibre is a hair-like strand of material. They are the smallest visible unit of a fabric and denoted by being extremely long in relation to their width. Fabric can be spun into yarn and made into fabric.A single fibre is too week to break but when it one made a fabric it is difficult to tear. Fabric needs more energy to tear apart as compared to single fibre.

26.

A female silk moth lays hundreds of eggs at a time. The eggs are stored on the strips of the cloth or paper and sold to silkworm farmers. The farmers keep eggs under hygienic condition at suitable temperature and humidity. At a particular temperature, the larvae hatch from eggs. This happens when mulberry trees bear a fresh crop of leaves. The larvae called caterpillars or silkworms, eat day and night and increase enormously in size. The worms are kept in clean bamboo trays along with the freshly chopped mulberry leaves. After 25-30 days start to spin cocoons. The cocoons get attached with twigs placed in the trays. The cocoons are boiled or exposed to stearn to separate silk fibres. Silk fibres are then spun into silk threads

27.

The wool is obtained from the hair of sheep in the following steps:
Step I-Shearing: The fleece of the sheep along with a thin layer of skin is removed from its body. Machines similar to those used by barbers are used to shave off hair. Usually, hair removed during the hot weather.
Step II-Scouring: The sheared skin with hair is thoroughly washed in tanks to remove grease, dust and dirt.
Step III-Sorting: The hairy skin is sent to a factory where hair of different textures are separated or sorted.
Step IV-The small fluffy fibres, called burrs are picked out from the hair. The fibres are scoured again and again and dried.
Step V-Fibres can be dyed in various colours.
Step VI-The fibres are straightened, combed and rolled into yarn. The long fibres are made into wool for sweaters and the shorter fibres are spun and woven into woollen clothes.

28.

Fibre	Smell	Burning Characteristics	Residue
Cotton	Burning paper	Burns with light smoke	Fine ash which crumble on touching
Nylon	Burning plastic	Melts and shrinks	Dry hard bead
Silk	Burning hair	Burns slowly	Silvery beads which easily crush to powder.
Wool	Burning hair	Burns slowly; stops burning when removed from the flame.	Brown shiny hollow beads which crumble on pressing