Friday, 21 October 2016

Links to visit for National Astronomy Olympiad & National Science Olympiad

National Astronomy Olympiad


National Science Olympiad

Saturday, 16 January 2016

Sa2 Sample Paper, Class 8th

1 marks
Q.1 Tadpoles develop into ---------------
Q.2 The different stages in the life cycle of a frog are
·      Egg        Larva       Pupa        Adult     
·      Egg        Larva       Pupa
 Larva       Pupa        Adult     
·      Egg        Larva       Adult     
Q.3 What is the nature of the charges generated due to rubbing?
Q.4 In which medium among wood and water, will the sound travel faster?
Q.5 What happens when we press a rubber ball placed on a table?
Q.6 What is a natural satellite?

Q.1 (i) What are petrochemicals?
(ii) Why petroleum is called black gold?
Q.2 Define refining of petroleum. Where it is carried out?
Q.3 What is an embryo? Where does the development of a human embryo take place?
Q.4 We can easily charge non-metals like rubber, woollen clothes, plastics, etc. whereas we cannot charge a copper rod by rubbing easily. Why?
Q.5 Write the following voices having different frequencies in the increasing order of their frequencies : (i) voice of a child, (ii) voice of an adult male, (iii) voice of an adult woman.
Q.6 Give reason for
(i) Change in seasons on the earth
(ii) Different phases of moon.

3 marks
Q.1 How petroleum is mined from their deposits?
Q.2 Why should we use the fossil fuels economically and wisely?
Q.3  Discuss the steps that occur during sexual reproduction.
Q.4 Suggest three measures to protect ourselves from lightning. 
Q.5 Give reason:
(i) During a thunderstorm, we see the lightning first and then hear the thunder.
(ii)   We do not hear the supersonic jets when they approach us, but hear a sudden boom after it has passed away.
Q.6 Give one word for each
(a) Stars forming a recoginsable pattern
(b) A solid body from outer space that is sometimes able to reach the earth’s surface
(c) A belt of small planetoids present mainly in between the orbits of Mars and Jupiter.

Q.1 What is carbonisation? Name three products obtained after the processing of coal. Also mention their uses.
Q.2 What is binary fission? Name the organism in which the binary fission is a method of reproduction.
Q.3 What are the causes of earthquake? Explain briefly two hazards caused by an earthquake.
Q.4 What do you understand by the term noise pollution? Suggest some ways of minimising noise pollution.
Q.5With the help of diagram, show the relative positions of prominent stars in
(a) Ursa major and
(b) Orion.

Friday, 15 January 2016


 1 marks question
Q.1 How do penguins keep themselves warm?
Q.2 Which regions of the earth have severe climatic condition?
Q.3 Which department gives the information about weather and how?
Q.4 Name the device which help to measure the speed of wind.
Q.5 How can we predict about the cyclones in advance?
Q.6 Where are the buds located in Bryophyllum?
Q.7 Which part of the potato forms new plant?
Q.8 What does slow change mean?
Q.9 Is crystallization an example of physical change?
Q.10 What happens to the wire when electric current is passed through it?

2 marks
Q.1 Give two functions of the large ears of elephant.
Q.2 When we move towards western region, which type of climate we see and why?
Q.3 Some birds travel as much as 15000 km to avoid the extreme climatic conditions to the same places every year. What are the probable reasons to travel to the same places evry year?
Q.4 Explain why a can (or bottle) with hot water gets distorted when cold water is poured over it?
Q.5  What is the need of seed dispersal?
Q.6 (i)What is galvanisation?

  1. Why galvanised pipes are used for supplying water?
Q.7 How can we make a battery of two cells ?
Q.8 Explain the working of fuse in a circuit.
3 marks
Q.1How does an elephant living in tropical rain forest adapt itself?
Q.2 "All the changes in the weather are caused by sun." Do you agree with this statement? If yes, then explain.
Q.3 Explain why holes are made in hanging banners and hoardings?
Q.4 What do you understand by the term 'leaf venetion'? What are the two types of leaf venetion?
Q.5 Show the diagram of the following parts of the plant:
(i) Stamen (ii) Pistil

Q.7 Which one is better technique to obtain sugar from sugar solution- crystallization or evaporation to dryness? 
Q.8 An electrician wants to replace a fuse by a piece of wire. Is it safe?
Q.9 What are electric fuses?
5 marks
Q.1(a) Rainforests offers hospitable climatic conditions to support huge population of animals. Explain how?

(b) Explain with examples how animals have adapted themselves to overcome the competition for food and shelter in the rainforests.

Q.2 What precautions should one take in a cyclone hit area?
Q.3 (a) Name an alga which reproduces by fragmentation. Explain its process of reproduction with help of a diagram.

(b) Define sporogenesis. Give an example.

(c) What is the mechanism of reproduction in
hydra and yeast?
Q.4 What is rusting? How can we prevent rusting?
Q.5 When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example in which both the chemical and physical changes take place.
Q.6 Explain and draw a circuit diagram to represent the picture shown below.


  1. The plant with following type of root is likely to have which kind of venation in it’s leaves?
  2. Which gas is released by the plants during photosynthesis?
  3. Which plant part gives out water vapours during the process of transpiration?
  4. Why do we get an electric shock?
  5. What is the cause of flood ?
  1. What is the difference between petiole and lamina.
  2. Complete the circuit as shown in figure to make the bulb glow?
  1. The height of a person is 1.65 m. Express it into cm and km.
  2. Take out a cool water bottle from refrigerator and keep it on a table. After some time you will notice water droplets on its outer surface. Why?
  1. Write a short note on the water cycle in flow chart format.
  2. How can we conserve water?
  3. Why do wet clothes dry up quickly in sunlight compared to shades?
  4. State different uses of water.
  1. Draw a labelled diagram of a flower. Name the male and the female part of a flower.
  2. Describe an electric cell with the help of a labelled diagram.
  3. (i)What is rain water harvesting?Explain.

(ii) Name the major source of water on earth.

(iii)Why sea water is unfit for drinking?

(iv) Write the percentage of water present in human body.

4. What is an electric switch? What is the purpose of using it? Give some examples of electrical appliances where electric switches are used.

Tuesday, 27 October 2015

List of websites for Science Olympiad
www.sofworld .com