Class 7 Question Paper 2023 Science

ANNUAL EXAMINATION

Question Paper
2023

NCERT BASED SYLLABUS
FOR CBSE AND STATE BOARD
FOLLOWING NCERT

ANNUAL EXAMINATION (2022-23)

Class - VII Subject – Science
Time – 3 Hours Maximum Marks- 80

Attempt all questions. However there are internal choices. Rough work to be done in
the right margin.

PHYSICS

Choose the most appropriate answer. [2 x 1= 2]

1. The splitting up of white light into seven colours on passing through a glass prism is called
(a) refraction
(b) deflection
(c) dispersion
(d) scattering [1]
2. The physical quantity which we cannot obtain from a D- T graph is
(a) speed
(b) time taken
(c) change in position
(d) acceleration [1]
Very short answer questions. [2x 1 = 2]
3. Write any two advantages of mercury to be used as a thermometric liquid. [1]

4. A shopkeeper wanted to fix a mirror which will give a maximum view of his shop. What type of
mirror should he use? Give reason. [1]
Short answer questions [3 x2 = 6]

5.What is an electromagnet? Sketch a labelled diagram. [2]

6.What is a second’s pendulum?A simple pendulum takes 52s to complete 20 oscillations, what is
the time period of the pendulum? [2]

7.Write any two properties of thermal radiations. [2]
Long answer questions [4x 3 = 12]

8. (a) Convert 98.6 ºF into ºC and Kelvin
(b) A thick glass tumbler is found to crack when hot tea is poured in to it. Explain. [3]

9. (a) A car moves with a speed of 40 km/h for 15 minutes and then with a speed of 60 km/h for
the next 15 minutes. Calculate the total distance travelled by the car.
(b) Figure shows the distance-time graph for the motion of two vehicles A and B. Which one of
them is moving faster? Explain. [3]

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10. (a) Name the material used to make the heating element of electrical appliances. Write their
features.
(b) Can we use a piece of copper wire instead of a fuse wire in an electrical circuit? Explain.
Explain [3]

11. (a) Sketch the formation of image for a point object by a plane mirror.
(b) What do you mean by a virtual image? [3]
Very long answer questions. [1x 5 = 5]

12. (a) Differentiate between a permanent magnet and electromagnet. (Any three points)
(b) Draw and label the circuit diagram of an electric bell.
OR

(a) The distance -time
time data for a moving car is given below
Time 9.00am 9.30am 10.00am 10.30am 11.00am
Distance(km) 3240 3260 3280 3300 3320

1. Plot the Distance –Time graph
2. What is the kind of motion represented by the graph
3. How much distance the car has travelled up to 9.45 AM.
(b) The odometer of a car reads 57321km when the clock shows the time 8: 30 am. What is the
distance moved by the car if at 8:50 am the odometer reading has changed to 57336km.
Calculate
lculate the speed of the car in km/min and in km/hr.?

CHEMISTRY
SECTION A [5×1=5]

1. Select the odd one out
(a) Soap (b) Orange (c) Vinegar (d) Curd

2. On passing carbon dioxide gas , lime water becomes milky due to the formation of
(a) Calcium Carbonate (b) Calcium Oxide (c) Calcium hydroxide (d) Calcium

3. Contamination of drinking water with sewage water can cause diseases like

(a) Dysentery (b) Typhoid (c) Cholera (d) All of these

4. Mention two environmental importance of forest.
5. Define infiltration.
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SECTION B [4×2=8]
6. (a) Explain why rusting of iron articles is faster in coastal areas than in deserts.
(b) Write the chemical equation for rusting of iron.

7. (a) What is canopy?
(b) Why forests are called green lungs?

8. Explain the function of the following
(a) Bar Screens
(b) Scraper

9. (a) Name the product formed when anaerobic bacterial decomposition of sludge takes place.
(b) Mention one use of the product formed.
SECTION C [3×3=9]

10. (a) Discuss any four harmful effects of deforestation.
(b) Explain how forest prevents flood.
11. There are two solutions' A' and' B'. Turmeric solution turns reddish brown in 'A' but remains
yellow in' B'.
(a) What can be the nature of 'B' ?
(b) What will be the colour change of phenolphthalein in 'A'?
(c) Suggest the colour of red litmus paper in 'A'.
(d) State the colour of blue Litmus Paper in 'A'?

12. (a) Define displacement reaction.
(b) Write the chemical formula of the following
i. Baking soda
ii. Acetic acid
iii. Magnesium hydroxide
iv. Magnesium oxide

SECTION D [1×5=5]

13. (a) Draw a labelled diagram of water table and label groundwater, water table and aquifer.
(b) Name two factors responsible for the depletion of water table. [3+2]
OR
14. (a) Draw a labelled diagram of drip irrigation.
(b) Mention the difference between soft water and hard water. [3+2]
BIOLOGY
I. Multiple Choice Questions (choose and write the correct option)-
1. Choose the correct option to fill the blanks:- [1]
Aquatic animals like fishes excrete cell waste as (i) _________ which directly dissolves in water.
Some land animals like birds and snakes excrete a semi-solid white coloured compound called

(ii) _____________. (iii) _________ is the major excretory product in humans.
(a) (i) ammonia (ii) urea (iii) uric acid
(b) (i) uric acid (ii) urea (iii) ammonia
(c) (i) ammonia (ii) uric acid (iii) urea
(d) (i) urea (ii) uric acid(iii) ammonia
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2. Match the following animals in column-I with their adaptations in column -II. [1]
Column -I Column -II
a) Toucan i) Modified teeth
b) Siberian cranes ii) Silver white mane
c) Tusks of elephant iii) Long beak
d) Macaque iv) Migration to India during
winter

(a) a) - ii, b) - iv, c) - iii, d) - i
(b) a) - iii, b) - i, c) - iv, d) - ii
(c) a) - i, b) - iv, c) - iii, d) - ii
(d) a) - iii, b) - iv, c) - i, d) - ii
II. Answer in one sentence: - [2x1=2]
3. Why it is difficult to predict the weather of a place while it is easy to predict its climate?
4. Explain the importance of ‘humus’ that is generally found in the uppermost layer of soil.
III. Short answer type I questions: - [4x2=8]
5. a. ‘The insectivorous plants are partial heterotrophs.’ Comment on this statement.
b. Give one example of (i) an insectivorous plant (ii) a parasitic plant.
6. Name the parts of the alimentary canal, where
(a) Water gets absorbed from the ingested food
(b) Digested food gets absorbed
(c) Taste of food is perceived
(d) Bile juice is produced
7. Kidneys are the major excretory organs in humans. Name the process and explain, how the
waste products released will be executed out if the kidneys are damaged or unfunctional.

8. The polar regions present an extreme climate. Then how do polar bears living in this region
adapt themselves? Mention two points with explanation.

IV. Short answer type II questions: - [3x3=9]
9. (a) Differentiate between breathing and respiration.
(b) Why do we breathe through nose and not through mouth?
(c) Why does lime water turn milky when we blow into it?
10. Give reasons for the following statements: -
(a) Caterpillars should not be collected with bare hands.
(b) The cocoons are kept under the sun or boiled or steamed before reeling the silk.
(c) A cotton garment cannot keep us as warm in winter as a woollen sweater does.
11. (a) Mention any two views that enable us to observe the soil profile of that place.
(b) Draw a neat diagram to represent the ‘Soil profile’ and label the following:

i. The layer that has a lesser amount of humus but more of minerals.
ii. The layer which is made up of small lumps of rocks with cracks and crevices.

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V. Very long answer-type questions: - [1.5+1.5+2=5]
12. (a) In the diagram given below, label the parts marked (a), (b) and (c)

(b) How does the process of fertilization takes place in flowers? Explain in three proper
steps.
(c) How do plants benefit by seed dispersal? Mention two points.
OR
(a) Draw a neat diagram to show spore formation in fungus and label two parts. [2+1+2=5]
(b) Name two plants that reproduce be means of spores.
(c) Mention one advantage and one disadvantage of vegetative propagation.

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DELHI PUBLIC SCHOOL
SAIL TOWNSHIP, RANCHI
ANNUAL EXAMINATION (2022-23)

Class - VII Subject – General Knowledge
Time – 1 Hour Maximum Marks - 50

1) This fish also called moonfish is the only known warm blooded fish-
a) Manatee
b) Opah
c) Dugong
d) None
2) Which country launched Mangalyaan or MOM into space in September 2014, thus joining a
select group of countries to send a spacecraft to the Mars?
a) India
b) USA
c) London
d) None
3) The Indian- born business executive is the CEO of Google Inc.
a) Sundar Pichai
b) R R.Martin
c) Lionel
d) Leonardo di Caprio
4) What is the number of bit used by the IPV6 address.
a) 32-bit
b) 128- bit
c) 256- bit
d) None

5) ..........is known as the silicon valley of India and a hub for IT companies.
a) Bengaluru
b) Pune
c) Kolkata
d) None
6) Which novel won the 2021 Pulitzer prize for friction?
a) The Night watch
b) David Diop

c) Dan Brown
d) Ishmael

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7) She launched a charitable organisation BEYGOOD which works for homeless, unemployed and
children's charities.
a) Shabana Azmi
b) Ophrah Winfrey
c) Beyonce
d) None
8) The ruins of .........., famous for stone structure built into the rocks.
a) Petra
b) Memphis
c) Tikal
d) None
9) This ancient Greek city got submerged underwater by a tsunami around 373 BC.
a) Rhodes
b) Create
c) Helike
d) None of the following

10) It is located in modern-day Athens on a flat- topped hill, the name of this ancient place means
'a city at the top'
a) Acropolis
b) Jerusalem
c) Petra
d) None
11) He became ' The Godfather of soul'.
a) James Brown
b) Elvis Presley
c) IM Rei
d) Charles
12) A ....... can produce the fastest winds on earth.
a) Tornado
b) Hurricane
c) Amphan
d) None
13) Dry slab is the most dangerous form of an ......
a) Avalanche
b) Cloudburst
c) Earthquake
d) None

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