CBSE Class 7 Science Sample Paper Set 3

CBSE Class 7 Science Sample Paper Set 3.Sample Papers are the very important for every student. The sample papers should be practiced to gain extra marks in examinations. The sample papers have been prepared based on summative assessment1 and summative assessment 2 pattern. The sample papers have been prepared based on pattern of last year examinations and as per latest changes in the syllabus. Students, teachers and parents can download all CBSE educational material and very well prepared worksheets from this website.  All CBSE educational material is developed by our panel of teachers, have also been submitted by CBSE teachers and students. 

Q.1 Fill in the blanks. 

i) The capacity of an element to combine with other element is _________.

ii) Ammonium sulphate is used as a _________.

iii) In _________ motion, the speed of a moving body along a straight line remains constant.

iv) The tube like mouthpart of a butterfly is called a _________.

v) Food is carried from the leaves to rest of the organs of plant through pipes formed by _________ tissue.

vi) Oxygen combines with haemoglobin in the blood to form _________.

Q.2 Choose the correct option. 

i) A triatomic gas is -

a) Hydrogen b) Oxygen c) Ozone d) none

ii) Hydrochloric acid can be neutralized by :

a) nitric acid b) citric acid

c) sulphuric acid d) sodium hydroxide

iii) An event that occurs at regular interval of time in a pendulum.

a) circular b) linear c) periodic d) curvillenear

iv) Plants store food as –

a) cellulose b) sugar c) glucose d) starch

v) Urea is a waste product produced in the process of the breaking down of –

a) proteins b) fats c) carbohydrate d) sugar

vi) The lungs have millions of air sacs called –

a) guard cells b) lenticels c) alveoli d) bronchioles

Q.3 Name the following : 

i) An abbreviation for the name of an element.

ii) Compounds that react with acids to form salts.

iii) The process by which heat travels without the help of a material medium.

iv) A unit used to measure speed of a ship.

v) Finger like folds in the wall of the small intestine.

vi) Tiny openings on stems and fruits that plants use for breathing 

Q.4 Give reasons for the following. (any three) (2×3=6)

i) Cooking utensils are made of metal.

ii) Herbivores like cow are called Ruminants.

iii) Gardeners loosen the soil from time to time.

iv) Some metal oxides are used for making refractory bricks.

v) An egg swells without its shell when it is placed in a bowl of water.

Q.5 Define the following. (any five) (2×5=10)

i) Compound radical ii) Acid rain

iii) Convection current iv) Enzymes

v) Excretion vi) Respiration rate

vii) Transpiration

Q.6 Draw well labelled neat diagrams. (any two) (3×2=6)

i) Lungs (respiratory organ)

ii) Sweat glands

iii) Clinical and laboratory thermometer

iv) Types of teeth

Q.7 Answer the following in not more than 20 words. (any six) (2×6=12)

i) What does the formula of a substance tell you?

ii) Name three mineral acids and give their formulae.

iii) Why do ships move rather slowly?

iv) What is the juice secreted by the liver called? What does it do?

v) What do we excrete in the process of sweating?

vi) What role do the hair and the membrane of the nasal cavity play?

vii) What is temperature? Name the scales to measure it.

Q.8 Answer the following in not more than 40 words. (any six) (3×6=18)

i) What happens to radiant heat when it falls on a body? What does the absorption of radiant heat by a body depend on?

ii) A car takes 20 mins to cover a distance of 15 km. Calculate its speed in

km/h and m/s.

iii) What are the general properties of basic substances?

iv) Find the valencies of underlined elements.

a) BaCl₂ b) MgSO₄ c) Na₂O

d) Na₂CO₃ e) FeCl₃ f) Al(OH)₃

v) Write briefly about the process of nutrition in amoeba?

vi) How does sweating help to maintain our body temperature?

vii) What are the two steps involved in respiration?

Q.9 Answer the following questions in not more than 100 words. (any five) (5×5=25)

i) (a) Write symbols of –

Mercury, Gold, Copper, Lead

(b) Write the formula of –

Ammonium Sulphate, Ferric Oxide (Iron III oxide)

ii) What are three bad effects of acid rain? How is it formed? Name two acidic gases.

iii) Explain how land and sea breezes originate?

iv) What happens to the food in the small intestine?

v) What is dialysis? How is it carried out?

vi) How does oxygen from the air in the lungs reach the cells?

vii) How would you show that chlorophyll is needed for photosynthesis?

Q.10 a) Label the parts given below from 1 to 5.

b) Give suitable heading to the above diagram. (1)

c) When a person should go for dialysis? (1)

d) Name the type of membrane which filters blood?

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