VikasBharati Public School

Final Terminal Examination (Session 2017-18)

Class: VII

Subject: Science (SAMPLE PAPER)

Time : 2.5Hr M.M80

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Note:1.This question paper contains 2 printed pages

2. All questions are compulsory

a) / List any two inorganic impurities present in sewage. / 1
b) / Identify the process taking place:
/ 1
c) / What kind of motion is being represented by the following graph:
D

T / 1
d) / How would you chemically express Silver chloride? / 1
e) / How would you define breathing rate? / 1
f) / Expand MCB. / 1
g) / Which gas is tested using Calcium hydroxide? / 1
h) / List any two ancient methods of measuring time. / 1
i) / Where is a zygote formed in a flower? / 1
j) / Rajat got a yellow colour on adding methyl orange to a solution. What could have been the nature of the solution? / 1
a) / Explain with the help of an equation, anaerobic respiration in muscles. / 2
b) / List any two physical properties of bases. / 2
c) / Calculate the speed of the car in km/min by referring to the data given:
Time Odometer reading
9:30 pm 64521 km
10:15 pm 64601 km / 2
d) / Distinguish between the unisexual and bisexual flowers. / 2
e) / Explain why galvanization and crystallization are physical changes. / 2
f) / Why is a nichrome suitable for making heating element of various appliances? Enlist two points. / 2
g) / How are the following seeds dispersed:
a)Coconut b) Madar c) Balsam d) Urena / 2
a) / Yeast is used to make wines from grapes. How does yeast respire to carry out this process? Write the word equation involved. What happens is any opening for oxygen is left? / 3
b) / List any three characteristics of a chemical change other than formation of a new substance. / 3
c) / Make the chemical formulae for:
i)Potassium hydroxide ii) Ammonium nitrate / 3
d) / List any three advantages of vegetative propagation. / 3
e) / Draw a pendulum and label its extreme and mean positions. Define the time period for it. How can the time period be changed for a given pendulum? / 3
f) / i)What is magnetic effect of electric current? Who discovered it?
i)Give any one reason for excessive current in an electrical circuit. / 2+1
g) / i)How is the sludge, separated from the clarified water, treated?
ii)List any two chemicals used for treating wastewater. / 3
a) / i)Name any two water borne diseases caused by drinking contaminated water.
ii)Expand WWTP.
iii)Identify HNO3.
iv)Define contaminants. / 4
b) / Explain how plant cells obtain oxygen
i)during daytime?
ii)at night? / 4
c) / Calculate the speed of a car if it travels 540 km in 3 hours.
Express the speed in m/s as well. / 2+2
a) / i)Identify the acid present in : a) Unripe mango b) Spinach
ii)ii) Why is factory waste neutralized before disposal? / 2+2
b) / How does respiration take place in i) earthworm ii) fish iii) fruits iv) plant roots / 4
c) /
  1. Explain with diagram how reproduction takes place in : i) Yeast ii) Bryophyllum
  2. Why is it harmful to discharge untreated sewage in the rivers?
/ 3+2
d) / Differentiate between :
  1. Organic and mineral acids
  2. Uniform and non uniform motion
/ 5
a) / Give reasons:
i)Water pipes are galvanised?
ii)Colour of blue copper sulphate solution become light green when iron powder is added to it. Explain the change taking place. Write the word equation in this case. / 2+3
b) / i)Sumit’s car travels at 108 km/h and Sandy drives at 45 m/s. Who is driving faster?
ii)Define magnetic effect of electric current. Who discovered it? / 3+2

1P.T.O