Class 7 Sample Paper Science (Half Yearly)

SAMPLE
PAPER
Half Yearly Examination

Prepared For
NCERT BASED SYLLABUS
Applicable For
CBSE BOARD AND STATE BOARD USING NCERT

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HALF YEARLY EXAMINATION
SAMPLE QUESTION PAPER

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 [2x1 =2]
1. Paheli and Boojho measured their body temperature. Paheli found her’s to be 98.6 °F and
Boojho recorded 37°C. Which of the following statement is true?
a. Paheli has a higher body temperature than Boojho.
b. Paheli has a lower body temperature than Boojho.
c. Both have normal body temperature.
d. Both are suffering from fever.

2. Which of the following is used as a side view mirror?
a. Plane mirror
b. Concave mirror
c. Convex mirror
d. Convex lens
Answer in one word/sentence [2x1 = 2]
3. Rajesh for observing dispersion of light, used light from laser torch to fall on a prism. Will he
be able to observe a band of seven colours?

4. State the principle of calorimetry.
Short answer questions [3x2 = 6]
5. State two similarities and two differences between the laboratory thermometer and the clinical
thermometer.

6. State the laws of reflection.
7. John is observing his image in a plane mirror. The distance between the mirror and his image
is 4 m. If he moves 1 m towards the mirror
a. What is the distance between john and his image?
b. Write any two uses of plane mirror.

Long answer questions [ 4 x3 = 12 ]
8. a. Sketch the image formation by a plane mirror for a point object.
b. The radius of curvature of a concave mirror is 7 cm. Calculate its focal length.
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9. a. Convert 100 degree Celsius into Fahrenheit and Kelvin.
b. At a camp site there are tents of two shades – one made with black fabric and the other with
white fabric. Which one will you prefer for resting on a hot summer afternoon? Give reason
for your choice. Would you like to prefer the same tent during winter?

10. What is a virtual image? Give one situation where a virtual image is formed.

11. a. Define the process of radiation of heat.
b. Write any two properties of thermal radiation.

Very Long answer questions [5 x 1 = 5 ]

12. a. Describe an experiment to show that heat travels from the hot end to the cold end of a
metal rod.
b. Why wearing more layers of clothing during winter keeps us warmer than wearing just
one thick piece of clothing?
OR

a. Describe an activity to show that light travels in a straight line.
b. Write any two differences between a convex and concave mirror.

CHEMISTRY
Section A [1×5=5]

1. A solution turns phenolphthalein pink .What is the nature of the solution?
2. Write the chemical formula of ash formed when Magnesium burns in oxygen?
3. What is an alkali ?
Choose the correct answer
4. The acid present in milk is
a. lactic acid
b. nitric acid
c. formic acid
d. Tartaric acid
5. The setting of curd is a
a. Chemical reversible change
b. Physical Irreversible change
c. Chemical Irreversible change
d. Physical reversible change

Section B [2×4=8]
6. What colour do the following indicators turn to when added to a base
a. Red cabbage juice

b. China rose indicator
c. Turmeric solution
d. Methyl orange

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7. a. Define neutralization reaction.
b. Write the word equation for the reaction between Sodium Hydroxide and hydrochloric
acid.
8. Vinegar is added to baking soda. A chemical reaction takes place and a gas is released .
a. Name the gas formed.
b. Which product is formed when this gas is passed through lime water?
c. What is the chemical name of lime water?
9. What is galvanization of iron ?

Section C
[3×3=9]
10. Which Chemicals are present in the following
a. Calamine
b. Window Cleaner
c. Milk of magnesia

11. Paheli has an acidic drink , a basic drink and a neutral drink .She has a red litmus and a blue
Litmus Paper. Explain how will she determine the nature of the three drinks .

12. a. Mention two differences between physical and chemical changes .
b. LPG exist as a liquid in the cylinder .When it comes out from the cylinder it becomes a gas
(Change A ) .Then it burns ( Change B).
Out of these two changes which is a chemical change? Explain.

Section D [5×1=5]

13. a. With the help of an activity show that both air and water are necessary for rusting to take
place.
b. Write the chemical formula of rust and mention its nature.
OR
14. a. Define displacement reaction .
b. With the help of a labelled diagram show the reaction between iron and copper sulphate
solution. (Mention the colour change also).

BIOLOGY
I. Multiple Choice Questions (choose and write the correct option)-

1. Which of the following statement is correct? [1]
Statement 1: In organisms called lichens, an alga and a fungus live together.
Statement 2: The alga provides shelter, water and minerals to the fungus and in return, the
fungus provides food which it prepares by photosynthesis.
a. Statement 1

b. Statement 2
c. Both statements 1 and 2
d. None of these

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2. Which combination of words is correct for P, Q, R, and S to fill in the blanks? [1]
Our heart is divided into P chambers. The upper two chambers called atria are Q walled while
the lower two chambers called ventricles are R walled. The left side of heart is completely
separated from right side with the help of a partition called S.
a. P- four; S- septum; Q- thin; R – thick
b. P- four; R – thick; S- septum; Q- thin
c. Q- thin; R – thick; S- septum; P- four
d. P- four; Q- thin; R – thick; S- septum

II. Answer in one sentence: - [1x2]
3. In amoeba, the food becomes trapped in a food vacuole. How does this food vacuole help in
the process of digestion?

4. a. Name one organism that respires anaerobically.
b. How does this organism help in beverage and baking industry?

III. Short answer type I questions: - [2x4]
5. Bile juice does not contain any digestive enzymes, yet it is essential for digestion, Why so? Mention
two points.

6. a. Respiration in fish is different from humans. Explain in brief how fishes can breathe through gills.
b. Draw a fish and label gills.

7. Mention two differences between arteries and veins.

8. a. Name the only artery that carries carbon dioxide rich blood in humans.
b. Why is it called an artery if it does not carry oxygen rich blood?
c. What is the purpose of using stethoscope by a doctor?

IV. Short answer type II questions: - [3x3]
9. a. Autotrophs and heterotrophs are two different organisms with distinct modes of
nutrition. How are they different from each other? Mention two points.
b. How is the association between leguminous plant and Rhizobium bacteria beneficial to each
other?

10. a. Gastric glands in stomach release hydrochloric acid, enzyme pepsin and mucus. What will
happen if mucus is not secreted by the gastric glands?
b. Name the following:
i. A parasitic plant with yellow, slender and tubular stem.
ii. Pores through with leaves exchange gases.
c. Alimentary canal is different from digestive system. Comment how?

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11. Given below is a schematic diagram of circulation. Study the same and answer the questions
that follow: -

a. Name the parts A and B indicated by guidelines.
b. Mention one functional difference between the parts marked C and D.
c. What is the main function of the part labelled E?

V. Very long answer type questions: - [5]
12. Observe the figure given as A and B and answer the following questions: -

a. Which of the figures A and B indicate the process of inhalation and which indicates the
process of exhalation?
b. Explain the mechanism of inhalation in human beings.
c. What role does the diaphragm play in the process of breathing?
d. Breathing through the nose is said to be healthier than breathing through the mouth.
Give reason why?
OR
a. Mention two differences between:
i. Aerobic and anaerobic respiration
ii. Respiration and photosynthesis
b. Why do mountaineers carry oxygen cylinders with them?

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