Sample paper science

Sample Paper
Class 7 Science
Sample Paper 3 | Class 7 Science

Class 7 Science

Sample Paper - 3

MAX. MARKS: 80 DURATION: 2 HRS

General Instructions:

(1) All questions are compulsory.

(2) This question paper contains 23 questions divided into four Sections A, B, C and D.

(3) Section A comprises 3 Questions (Fill in the Blanks, Multiple choice questions and True and False) of 20 marks.

(4) Section B comprises 8 questions of 2 marks each.

(5) Section C comprises 8 questions of 3 marks each.

(6) Section D comprises 4 questions of 5 marks each.

SECTION – A

Question 1:

FILL IN THE BLANKS: (1 x 10 = 10)

1. The bodies of living organisms are made of tiny units called __________.

2. The largest gland in the human body is __________.

3. Temperature of boiling water cannot be measured by a __________ thermometer.

4.The chemical nature of baking soda is __________.

5. Haemoglobin is present in __________ cells.

6. The safety device on the heating effect of electric current is called as __________.

7. Image formed by a convex __________ is always virtual and smaller in size.

8. Flowers are the __________ parts of the plants.

9. The insects, butterflies, honeybees and birds help flowering plants in ___________ .

10. Cleaning of water is a process of removing __________.

Question 2:

Choose the correct answer: (1 X 5 =5)

1. Cuscuta is an example of:

(a) autotroph

(b) parasite

(d) host

2. Water from the undigested food is absorbed mainly in the

(a) Stomach

(b) food pipe

(d) large intestine

3. Which of the following produces a new plant when their parts get detached from the main plant body?

(a) Dahlia

(b) Sweet Potato

(d) Bryophyllum

4. In cockroaches, air enters the body through

(a) lungs

(b) gills

(d) skin

5. In plants, water is transported through

(a) xylem

(b) phloem

(d) root hair

Question 3:

Write ‘True’ or ‘False’: (1 X 5 = 5)

1. Nitric acid turns red litmus blue.

2. The fishes have lungs for respiration.

3. An electromagnet does not attract a piece of iron.

4. A real image cannot be obtained on a screen.

5. Rain is the ultimate source of water.

SECTION – B (2 Marks each)

Question 4:

What do you understand by "cystallization"?

Question 5:

Give one use each of a concave and convex mirror.

Question 6:

Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature?

Question 7:

Distinguish between a parasite and a saprotroph.

Question 8:

What are villi? What is their location and function?

Question 9:

What is reproduction? What are two types of reproduction?

Question 10:

Why do you mean by excretion?

Question 11:

What do you understand by respiration?

Section – C (3 marks each)

Question 12:

Explain why burning of wood and cutting it into small pieces are considered as two different types of changes.

Question 13:

What are the benefits of transpiration in plants?

Question 14:

Why do we get instant energy from glucose?

Question 15:

(a) Why an antacid tablet is taken when you suffer from acidity.

(b) Calamine solution is applied on the skin when an ant bites.

Question 16:

Explain how painting of an iron gate prevents it from rusting.

Question 17:

Explain why holes are made in hanging banners and hoardings.

Question 18:

If a bicycle covers 500 meters in half an hour, then how many km it will covered in 1 hour?

Question 19:

(a) Why should we avoid throwing cooking oils in drains?

(b) State beneficial activity of microbes in sewage disposal.

Section – D (5 marks each)

Question 20:

Why do we often sneeze when we inhale a lot of dust-laden air?

Why does an athlete breathe faster and deeper than usual after finishing the race?

Question 21:

(a) How does china rose helps to detect whether a given substance is an acid or a base?

(b) How does Phenolphthalein helps to detect whether a given substance is an acid or a base?

Question 22:

Salma takes 15 minutes from her house to reach her school on a bicycle. If the bicycle has a speed of 2 m/s, calculate the distance between her house and the school.

Question 23:

How does the process of fertilisation take place in flowers?

**********

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