Grade: 6 Science Olympiad Qualifier Set: 2

Transcription

1 Grade: 6 Science Olympiad Qualifier Set: Max Marks: 60 Test ID: Time Allotted : 40 Mins Instructions: Each question has four choices (A), (B), (C) and (D) out of which ONLY ONE is correct. Each question carries 2 Marks. There is no negative marking 1. Below is a graph showing how the body temperatures of a class of pupils vary. What is the temperature of most of the pupils? A B C D The drawing shows a slightly soft football on a scale. The football has a mass of 760g. If the ball is now pumped up fully, what is its mass likely to be? A. 750g B. 760g C. 790g D. 740g 3. A candle requires oxygen to burn. Oxygen is a component of air. Observe the diagrams below. The candles in jar 3 will go out first. This is probably since Page 1 of 10

2 A. there is less oxygen in jar 3 B. there is more oxygen in jar 3 C. two candles need more oxygen than one D. there is more oxygen in jar 2 4. Dandelions are plants that have a pappus of hair attached to each of their seeds. The purpose of the pappus is to: A. attach the seed to animals B. attach the seed to the mother plant C. allow the seed to absorb water D. allow the seed to be carried by the wind 5. A steel knitting needle has several drawing pins held on to it with a bit of Vaseline at distances of 2cm apart. The tip of the needle is held in a flame. Which of the answers below give an accurate description of what will happen? A. The drawing pin closest to the tip of the needle will fall off first. B. The drawing pin closest to the head of the needle will fall off first. C. None of the drawing pins will fall off. D. All the drawing pins will fall off at the same time. 6. The bar graph shows the noise level (in decibels) of a number of activities: The activities that have a higher noise level than traffic on a busy street are: Page 2 of 10

3 A. conversation 1 meter away; pop concert; whisper; Boeing 747 B. motorbike accelerating; Disco; Boeing 747; whisper C. pop concert; Motorbike accelerating; Medium-sized office; silence D. disco; pop concert; motorbike accelerating; Boeing Which of the following statements most accurately describes the meaning of the word migration? A. When an animal has a useful feature that helps it to live in a habitat. B. When an animal has a useful feature that helps it to survive in cold weather. C. When a large group of animals move to new breeding or feeding grounds. D. When an animal sleeps through a season such as winter 8. A rain gauge is a container that we put outside to collect rain. Then we can measure how much has fallen. Which of the following containers would be most suitable to use as a rain gauge? 9. Which of the following statements is true about the evaporation of water from an open container? A. Evaporation is slower when there is a breeze. B. Evaporation takes place faster on a humid day. C. The process of evaporation gives off energy. D. Some water particles leave the liquid and become part of the air. 10. Some of the following statements are true, and some are false. (i) A tadpole is an aquatic invertebrate (ii) A bat is a carnivorous mammal (iii) A fish is a cold-blooded vertebrate. (iv) Birds have feathers to insulate their bodies (keep them warm). (v) Bats lay 2 eggs at a time. (vi) A centipede has an exoskeleton. Which of the statements above are false? Page 3 of 10

4 A. (i) ( v) B. (i) ( v) ( vi) C. (ii) (iii) ( vi) D. (i) ( iv) (v) 11. Look at the following drawing of the inside of a torch. Which of the circuit diagrams (A D) shows this torch when it is switched off? 12. You need to accurately measure 90 ml of water. Which of the following pieces of equipment would be best to use? A. a 10-ml measuring cylinder B. a 100-ml beaker C. a 100-ml measuring cylinder D. a 250-ml beaker 13. Robben island has been shooting huge numbers of rabbits since October 2009 to keep just about a number that can adequately feed on the available vegetation. The rabbit numbers were growing too fast and the buildings on the island were getting damaged. Rabbits dig out burrows as their homes under the historic buildings. Stray cats (that grew up in human homes) and deer (buck) are also found on the Island. People suggest various reasons for the decline of rabbit numbers as given below: (a) (b) (c) (d) Deer are herbivores and feed on rabbits Many cats can feed on one rabbit The prison warders (guards) sometimes shot rabbits Cats feed on rabbits The suggestions that make sense are: A. (a) and (c) B. (b) and (d) C. (a) and (b) D. (c) and (d) 14. Which of the following statements about Earth is NOT true? Page 4 of 10

5 A. Earth rotates on its axis in an orbit around the sun B. One rotation takes 24 hours or a day C. One complete revolution around the sun takes a month D. One complete rotation accounts for day and night 15. Choose the option below that best shows the properties of an iron nail. Transparent (seethrough) Hard Brittle Conducts electricity A X X B X X X C X X D X X Soli d at room 16. Seeds are designed to be spread as far as possible from the mother plant. They are spread in different ways. Below are pictures of several fruits and seeds Which ones are spread by wind? A. 1 and 2 B. 2 and 4 C. 1 and 3 D. 3 and 4 Page 5 of 10

6 17. The weight of a given object can change, depending on the mass and size of the planet on which it is located. The greater the mass of the planet, the greater will be the gravitational force it exerts on the object. The weight of a 1kg object on various planets are shown below: Mass Weight Planet 1 Kg 10 N Earth 1 Kg 26.5 N Jupiter 1 Kg 8.4 N Venus 1 Kg 3.7 N Mars The planet with the highest weight is A. Venus. B. Earth. C. Mars. D. Jupiter 18. A student decided to find out if several foods contain sugar. The chemical used to test for sugar (glucose), turns brick-red in the presence of sugar. The table shows the results the student obtained. Bread Apple Chips Carrot Brown colour Brick-red colour Brown colour Brick-red colour Which foods contain sugar? A. Apple B. Bread and chips C. Carrot D. Apple and carrots 19. Micro-organisms (tiny living organisms) such as bacteria cause food to decay. The best way to preserve food is to remove the conditions that these micro-organisms need to thrive. These conditions may be: (i) removal of water (ii) use of high temperatures (iii) use of low temperatures (iv) removal of oxygen (v) use of chemicals Which of the above methods are applied to preserve pickled onions and soup powder? Page 6 of 10

7 A. (i) and (iv) B. (i) and (v) C. (i) and (ii) D. (ii) and (iv) 20. Water pollution may be caused by chemicals or by large amounts of organic matter (dead plants and animals; animal droppings). Oxygen is used up during the decomposition of organic matter. The table below gives information about the oxygen level in water where some animals will survive: Animal Oxygen level per liter of water Stonefly nymph Damselfly nymph Bass Whirligig beetle Sludge worm Rat tailed maggot Which animal requires the least polluted water to survive? A. Whirligig beetle B. Bass C. Damselfly nymph D. Stonefly nymph 21. Which animal will survive in the water where large amounts of farm animal droppings are washed into the water? Animal Oxygen level per liter of water Stonefly nymph Damselfly nymph Bass Whirligig beetle Sludge worm Rat tailed maggot Page 7 of 10

8 A. Bass B. Rat-tailed maggot C. Sludge worm D. Damselfly 22. At constant pressure, average kinetic energy of gas molecules increases 2 times if A. Temperature is increased by 2 times B. Temperature is halved C. No change in temperature D. None of the above 23. The diagram below represents phase changes of water. Each of the numbers (1 4) represents a process of change. Choose the option below that gives the correct names for all four processes A melting freezing evaporation condensation B dissolving solidifying evaporation precipitation C dissolving freezing boiling precipitation D melting solidifying boiling crystallization 24. Which of the following sentences is not true for all insects? A. They have six legs B. They can fly C. They have compound eyes D. They have an exoskeleton Page 9 of 10

9 25. Mutualism is a relationship when two different living things live together and both of them benefit. Which one of the following relationships is an example of mutualism? A. an oxpecker bird eating ticks off a cow B. a tick sucking blood from a cow C. a tapeworm living inside the intestines of a cow D. a cow eating leaves from a tree 26. In a circuit having 1 bulb, another bulb is added. The new bulb will be A. Get Fused B. Not Glow C. Glow more brightly D. Glow but less Brightly 27. A predator is an animal that... A. eats dead animal carcasses B. never needs water C. actively hunts other animals D. is never hunted by other animals Page 10 of 10

10 28. Your class group planted bean seeds in loamy, sandy and clay soil in your classroom. Your plants were treated the same and put in similar positions. Over a period of ten days, this should have happened: A. The seeds all grew well B. The seeds grown in clay grew better than the rest C. Seeds grown in loam and sand grew equally well D. Loamy soil gave the best plants 29. Refer to the diagrams showing the different phases of the moon and choose the letter corresponding to their correct order/sequence: A. 1,2,3,4 B. 4,1,3,2 C. 4,1,2,3 D. 4,3,2,1 30. During an eclipse of the sun, only some of the following things happen. (i) The sun, earth and moon are in a straight line. (ii) The earth is between the sun and the moon. (iii) The moon s shadow falls on the earth. (iv) The earth s shadow falls on the moon. Choose the option that shows the things that happen. A. (ii) and (iii) B. (i), (ii) and (iii) C. (i), (ii) and (iv) D. (i) and (iii) Page 10 of 10