SUMMATIVE ASSESSMENT- II MARCH 2015

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INTERNATIONAL INDIAN SCHOOL, AL-JUBAIL Eastern Province Kingdom of Saudi Arabia المدرسة العالمية الهندية - المنطقة الشرقية المملكة العربية السعودية الجبيل SUMMATIVE ASSESSMENT- II MARCH 2015 SUBJECT:

1 INTERNATIONAL INDIAN SCHOOL, AL-JUBAIL Eastern Province Kingdom of Saudi Arabia المدرسة العالمية الهندية - المنطقة الشرقية المملكة العربية السعودية الجبيل SUMMATIVE ASSESSMENT- II MARCH 2015 SUBJECT: SCIENCE CLASS: VIII M/MARK: 90 TIME: 3 Hours BIOLOGY (30 Marks) Q1. Define the following terms:- (1+1+1 =3) a) Flora b) Species c) Target site Q2. What is the term used for a species found in a particular habitat? (1) Q3. What is the forest conservation act of India? (1) Q4. Name the causative agent for the disease AIDS? (1) Q5. Differentiate between the following: - (2+2=4) i) Endangered and extinct species ii) Zygote and Foetus Q6. What is balanced diet? Write two examples of iron-rich foods? (2) Q7. Protected forests are not completely safe for wild animals. Why? (2) Q8. Differentiate between two types of animals in which internal fertilization takes place. (2) Q9. Write two effects of deforestation on earth? (3) Q10. a) Define asexual reproduction. (1) b) Represent diagrammatically binary fission in Amoeba. (2) Q11. Write Short notes on: - (3) a) Adam s apple. b) Function of adrenalin Q12. (1+1+3 =5) i) Write the names of sex hormones. (1) ii) What are the sex chromosomes for male and female? (1) iii) How do sex chromosomes play a role in determining the sex of foetus? (3) 1

2 I. Choose the correct option.4 X ½ = 2 M PHYSICS (30 Marks) 1.When electrolysis of water is carried out, water is decomposed into ( ) a) Oxygen gas only b) Both oxygen and hydrogen c )Hydrogen only d) None of these 2. Which one of the following musical instruments is different from others ( ) a) Guitar b) Veena c) Violin d) Flute 3. The unit of loudness is ( ) a) Hertz b) Decibel c) Metre d) Volt 4. Which one of the following sounds can be heard by humans a) 100 Hz b) 10 Hz c) Hz d) None of these II. Fill in the blanks 5 X ½ = 2 ½ M 1. Air allows the passage of electric current during Sounds more than Hz are called ultrasonic sounds. 3. Loudness is determined by the of vibration water is free of salts. 5. The passage of an electric current through a solution causes effect. III. State True or False. 4 X ½ = 2 M 1. Cans used for storing food are made by electroplating zinc on iron Impurities in water increases conductivity Sound cannot travel in vacuum The lower the frequency of vibration, the higher is the pitch IV. Give reasons. 3 X 1 ½ = 4 ½ M 1. Which isseen or heard earlier/later lightning or thunder, even though both take place in the sky at the same time and at the same distance from us. Explain. 2. Is it safe for an electrician to repair a faulty wire in the park when it is raining heavily? Explain. 3. Chromium plating is done on car parts, bath taps, wheel rims etc. V. Write the differences between the following 2 x 2 = 4 M 1. Music and noise. 2. Good conductors and poor conductors. 2

3 VI. Answer the following ( 15M) 1. (a) A pendulum makes 20 oscillations in 40 seconds. Find its time period and frequency.2m (b) Draw wave forms for drum sound (low pitch) and whistle sound (high pitch). 1M 2. Write three harmful effects of noise pollution. Suggest three ways to reduce noise pollution. 3M 3. Sketch larynx and explain its function OR Explain an activity to construct and show the working model of an ear drum. 3M 4. Write the full form of LED. Why it can be placed in the place of a bulb in the tester? 2M 5. What is electroplating? Explain the process of electroplating with the help of a labelled diagram. OR Name any two effects of electric current. Explain anactivity to make a tester using the magnetic effect of current to check the conductivity of lemon juice and milk with the help of a labelled diagram. 4M CHEMISTRY (30 Marks) 1. What are inflammable substances? 1m 2.What is Richter scale? 1m 3. What is potable water? 1m 4. Sometimes a crackling sound is heard while taking of sweater during winter. Explain. 2m 5. Increased level of nutrients in the water affect the survival of aquatic organisms. Why? 2m 6. Which is combustion among the following processes?. Why? 2m 1. Rusting of iron 2. Burning of charcoal. 7. What is marble cancer? Name any two gases which cause acid rain. 1+1=2m 3

8. What is the importance of the presence of CO2 in the atmosphere? What will happen if its concentration in the air increases? 2m 9. What is lightning rod? Do not lie on the ground while lightning.

4 8. What is the importance of the presence of CO2 in the atmosphere? What will happen if its concentration in the air increases? 2m 9. What is lightning rod? Do not lie on the ground while lightning. Why? 1+1=2m 10. Which type of combustion takes place when white phosphorous catch fire?.explain. 2m 11. Compare LPG and wood as fuel. 3m 12. Draw a candle flame and label the hottest and the least hot regions. Give reason. 3m 13. i) What is calorific value of a fuel? 1+3+1=5m ii) Complete the table with needed calculations Name of Weight Energy Calorific the fuel produced value Kerosene 2 kg 90000kJ Biogas 2.5 kg 40000kJ/kg iii).identify the efficient fuel from the table. 14. Label the diagram with the following points. 2m a) epicenter b) seismic waves c) focus d) fault zone 4

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CLASS 8 (SCIENCE)-EM

1 CLASS 8 (SCIENCE)-EM UNIT-1 CHAPTER: 1 - CROP PRODUCTION AND MANAGEMENT Agricultural Practices: Preparation of soil Agricultural Implements Sowing Adding manure and fertilisers Irrigation Protecting