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Science Olympiad Qualifier – Grade – 7
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---------------------------------------------------------------------------------------------------------- Max Marks: 60 Test ID: 77701 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. In the diagrams below, it is observed
in diagram `X’: when the cloth and the balloon are brought close to each other nothing happens. In diagram `Y’, when the cloth and the balloon are brought close to each other, they attract one another. In diagram `Z’ when the balloon is brought close to another balloon they repel.
The above observations are based on the study of electrostatics. Study each of the statements below in respect to electrostatics: (i) like charges repel one another (ii) unlike charges attract one another (iii) in `X’ both the cloth and the balloon have equal numbers of positive
and negative charges (iv) in `Y’ both have the same charge (v) in `Z’ both have the same charge
Which of the above statements could be true? A. (i) & (v) only B. (i), (ii), (iii) & (v) only C. (i), (ii), (iii) & (iv) only D. all of the above
|Grade: 7 | |Science Olympiad Qualifier | | Set: 2|
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2. The graph below shows the sources of energy used to generate electricity in four
countries.
Which Country uses the most amount of renewable resources? A. Country A B. Country B C. Country C D. Country D
3. Water was boiled in a kettle and poured into a large glass beaker. A stainless steel
spoon, a piece of rolled-up aluminum foil, a plastic spoon and a wooden spoon were placed in the beaker, as in the diagram below. After 20 seconds, each spoon and the aluminum foil were touched.
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Which materials would be identified as good conductors?
A. Stainless steel spoon and roll of aluminum foil B. Roll of aluminum foil and plastic spoon C. Plastic spoon and stainless steel spoon D. All of the above
4. There’s a time in everyone’s life when we as humans start to develop sexually. This period of maturity is called puberty. Puberty starts at different ages and there is no ‘right’ or ‘wrong’ time.
Which of the following statement/s best describe the changes that take place in puberty?
i) Girls reach puberty first ii) Hormones begin to circulate in your blood iii) Skin becomes oily iv) Sex cells are produced v) Girls go on growing for longer
Select the correct combination.
A. i, ii, iii and iv B. ii, iii and v C. i, ii, iv and v D. All of the above
5. The sign alongside means:
A. Highly flammable B. Oxidizing substance C. Toxic D. Corrosive
6. Some of the solar energy falling on grasslands is used for plant production.
In the flow diagram the green plant synthesises 500 kJ of energy. This energy is then passed on through the food chain and about 90% of the energy is transferred or transformed to other forms of energy between different consumers. In the flow diagram only 10% of the energy is passed on.
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How much energy will be available at the secondary consumer level and at the tertiary level?
A. 0.5 kJ, 0.05 kJ B. 0.5 kJ, 0.25 kJ C. 5 kJ, 0.5 kJ D. 5 kJ, 0.05 kJ
7. When a ship crosses the International Date Line from East to West:
A. it loses one day B. it gains one day C. it loses half a day D. it gains half a day
8. Study the given plant and identify the
vegetative parts of the plant.
A. 1 and 2 B. 1 and 3 C. 3 and 4 D. 2 and 5
9. Study the given plant, identify the observable
part/parts that make it an Angiosperm:- A. flower only B. flower and fruit C. stem and fruit D. net-veined leaves and stem
10. Living organisms are made of building blocks called cells. They may differ in size, in the way they look and in what they are used for.
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Look at the pictures of different cells.
Which diagrams represent plant cells?
A. iii and iv B. ii and v C. i and iii D. i and iv
11. To change a gas to a liquid, you need to _____________ the amount of energy.
A. increase B. decrease C. keep the same D. hydrolyze
12. The Earth takes 365 ¼ days to move around the sun. At ‘A’ the South Pole is tilted
towards the sun and the sun’s rays are directly over the Tropic of Capricorn. At ‘B’ the South Pole tilts away from the sun and the sun’s rays are over the equator. At ‘C’ the South Pole is tilted away and the sun’s rays are directly over the Tropic of Cancer. At ‘D’ the South Pole starts to tilt towards the sun and the sun’s rays are directly over the equator. What seasons are being experienced at the South Pole at A, B, C and D respectively?
A. Summer – Autumn – Winter – Spring B. Spring – Summer – Autumn – Winter
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C. Autumn – Summer – Spring – Winter D. Winter – Spring – Summer - Autumn
13. Calculate the missing values in the table below:
Place Object Mass Value of Gravity Weight
Earth Bag of flour 2.5kg (i) 25N Sun Tin of fruit 500g Each kilogram of matter
weighs 272N (ii)
Moon Pocket of potatoes
10kg (iii) 17N
Jupiter Block of Margarine
1kg Each kilogram of matter weighs 25N
(iv)
Which of the following answers below represent the correct answers? (i) (ii) (iii) (iv) A 25 10 1.7 137500 B 62.5 1.8 10 1.7 C 170 62.5 25 10 D 10 137.5 1.7 25
14. Examples of organisms classified as arthropods are:
A. Insects, spiders, millipedes, starfish B. Millipedes, centipedes, crabs, sea anemone C. Lobsters, crabs, insects, spiders D. Spider, snails, starfish, octopus
15. Force is calculated as mass X acceleration:
A bus which has a mass of 1200kg is accelerating at 0.5m/s2. Calculate the resultant force acting on the bus to produce this acceleration:
A. 60 N B. 600 N C. 6.0 N D. 6000 N
16. The following flow- diagram represents water in different states. The missing key
words are: condensation- sublimation- melting- freezing- evaporation: Select the correct combination that represents I, 2, 3, 4 & 5 respectively:
A. Condensation-evaporation- freezing- melting- sublimation B. Evaporation- sublimation- melting- freezing- evaporation
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C. Freezing- melting- condensation- evaporation- sublimation D. Evaporation- condensation- melting- sublimation- freezing
17. The moon revolves
around the earth approximately once every 27.3 days. This is a lunar month. When the side lit by the sun faces the earth we see a full moon. Sometimes we see no moon at all. This is when the moon is on the side of the earth nearest the sun. This is called new moon.
Study the diagrams and select the numbers representing the phases of the moon for new moon: full moon, respectively.
A. 1 AND 5 B. 4 AND 8 C. 2 AND 6 D. 5 AND 1
18. The pH number of a liquid tells its level of acidity or alkalinity. Some chemicals have different colours when put into liquids with different levels of acidity. These chemicals are called indicators.
The following table shows the colour changes that occur with four different acid-base indicators.
Indicator
Colour of Indicator
Acidic pH Basic
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1 red Blue
2 clear pink
3 red Orange
4 yellow Purple
Four liquids P, Q, R and S were tested with indictors 1, 2, 3 and 4. The results
are recorded below. Which liquid has the highest pH?
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Liquid
Colour of Indicator
Indicator 1 Indicator 2 Indicator 3 Indicator 4
P blue clear orange Purple
Q blue pink orange Purple
R red clear red Yellow
S red clear orange Yellow
A. P B. Q C. R D. S
19. Look at the pictures of the houses. Which house will be the hottest in summer?
A. House A B. House B C. House C D. House D
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20. The picture below shows an electric motor lifting a weight. What types of energy
does the motor produce?
A. Chemical energy, electrical energy and kinetic energy B. Potential energy, kinetic energy and chemical energy C. Kinetic energy, heat energy and sound energy D. Kinetic energy, chemical energy and heat energy
21. The movement of thermal energy from a warmer object to a cooler object.
A. Thermal Energy B. Heat C. Temperature D. Specific Heat
22. As water begins to boil in a kettle the hotter water at the bottom of the kettle
closest to the stove begins to rise and the cooler water above sinks and warms. This is an example of:
A. conduction B. radiation C. convection D. heat
23. When is an object in motion?
A. when its distance from another object is changing B. when the point of reference remains the same C. only if the object is rolling D. if the object has forces acting on it
24. The amount of electricity that is flowing around a circuit is known as__________
A. ammeter B. battery C. current D. altitude
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25. What is the name of the storm that originates over the Indian Ocean?
A. Hurricane B. Typhoon C. Cyclone D. Tornado
26. A packet, or bundle of light energy is called a(n)
A. proton B. wave C. photon D. electron
27. What is formed when an acid reacts with an alkali?
A. Salt + hydrogen B. Salt only C. Salt + water D. Sodium hydroxide
28. A material that is woven or knitted, such as cloth is called__________________
A. fabric B. metal C. trudged D. soared
29. Which of the following is an example of asexual reproduction?
A. a fish releases sperm which unite with an egg of another fish B. a worm is split in two, each half grows back in to a complete worm C. a gray cat is the offspring of a black cat and a white cat D. flowers from two different plants are mated to produce a seed
30. A plant that has both male and female reproductive structures is able to .
A. self-replicate B. self-pollinate C. change colors D. none of the above
