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ASMO Science Olympiad 2015 — Level 2 (Years 5 & 6)

Question 1

Rusting process will cause the weight of iron to

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  1. Decrease
  2. Remain the same
  3. Increase
  4. Uncertain

Question 2

Chlorine is added into water for public water supplies. What is the purpose of the addition of chlorine?

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  1. To kill germs.
  2. To add in nicer taste into water.
  3. To colourise water.
  4. To prevent tooth decay.

Question 3

The diagram above shows that the light bulbs lighted up when the circuits were connected by immersing the iron rods into sea water and distilled water respectively. What is there difference in the brightness of light bulbs by using both solutions to complete the circuit?

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  1. Sea water is an electrolyte.
  2. Sea water contains ions that conduct electricity better.
  3. Distilled water has a higher electrical resistance.
  4. Water molecules conduct electricity easier in sea water.

Question 4

Which of the following substance is soluble in water?

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  1. Chalk powder
  2. Milk powder
  3. Potassium
  4. Cement

Question 5

Which of the following substance is used to produce artificial rain?

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  1. Carbon dioxide
  2. Iodine
  3. Silver iodide
  4. Sodium chloride (Table salts)

Question 6

In the making of canned food, why tin is chosen instead of zinc to be electroplated onto the surface of iron can?

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  1. Zinc can cause danger to human health.
  2. Tin is cheaper.
  3. Tin has a lower melting point.
  4. Zinc is more reactive.

Question 7

In stratosphere layer, there is a type of gas that functions to filter off the ultraviolet light present in sunlight to protect the living things from the harmful radiation. What is this gas?

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  1. Methane
  2. Ozone
  3. Carbon monoxide
  4. Nitrogen

Question 8

Mature ovary of a plant
Developed from a flower

Which of the following has the above characteristics?

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  1. Seed
  2. Bud
  3. Root
  4. Fruit

Question 9

Light years is the unit to measure ______?

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  1. Time
  2. Distance
  3. Number of year
  4. Intensity

Question 10

If a person's diet is deficient in sour fruits, he or she might be at risk for

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  1. Rickets
  2. Beri-beri
  3. Scurvy
  4. Night blindness

Question 11

Diagram below shows two types of cells.

Which of the following is TRUE?

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| Choice | Cell X | Cell Y |
|---|---|---|
| A | Earthworm cell | Chicken cell |
| B | Rabbit cell | Maize cell |
| C | Hibiscus cell | Bougainvillea cell |
| D | Whale cell | Horse cell |
  1. Earthworm cell | Chicken cell
  2. Rabbit cell | Maize cell
  3. Hibiscus cell | Bougainvillea cell
  4. Whale cell | Horse cell

Question 12

Given
Momentum = Mass x Velocity
Kinetic energy = ½ x Mass x Velocity²
When an increase in velocity doubles the momentum of a moving body, its kinetic energy will_____

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  1. Doubles
  2. More than doubles
  3. Halves
  4. Increases

Question 13

A Helium nucleus consisted of ___?

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  1. 2 protons, 2 neutrons,2 electrons
  2. 2 protons, 2 neutrons
  3. 2 protons, 4 neutrons, 2 electrons
  4. 2 protons, 4 neutrons

Question 14

What will happen to the force of gravity if the mass of one of the objects is tripled?

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  1. One third of the original gravitational force.
  2. Triple the original gravitational force.
  3. The gravitational force will be reduced gradually by 3 times.
  4. The gravitational force will remain the same value.

Question 15

Which of the following sequences best represents the phases of the moon as seen from Earth over the course of one month?

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  1. Sequence A in the source diagram
  2. Sequence B in the source diagram
  3. Sequence C in the source diagram
  4. Sequence D in the source diagram

Question 16

Cold pack is used to cover the forehead of kids when they have fever. What is the chemical used in cold pack?

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  1. Ammonium nitrate
  2. Sodium hydroxide
  3. Calcium chloride
  4. Copper (II) sulphate

Question 17

The diagram shows 4 ball floating on water.

Which statement about the comparison of density of each ball is correct?

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  1. P>Q>R>S
  2. P>R>Q>S
  3. S>Q>R>P
  4. Q>R>P>S

Question 18

What is the temperature that will change the protein structure?

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  1. 10°C
  2. 27°C
  3. 37°C
  4. 60°C
  5. None of the above

Question 19

By comparing between iron (III) oxide and chromium (III) oxide, it is observed that chromium (III) oxide is much harder than iron (III) oxide. Why is that so?

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  1. Chromium (III) oxide has a higher molecular weight.
  2. Chromium (III) oxide has stronger ionic bonds.
  3. Chromium (III) oxide layer is impermeable and non-porous.
  4. Chromium (III) oxide is waterproof material.

Question 20

“A rainbow is an optical and meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky”

Arrange the colour of rainbow from longer wave length to shorter wavelength

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  1. Red, Orange,Yellow,Green,Blue, Indigo, Violet
  2. Violet,Indigo, Blue, Green, Yellow,Orange,Red
  3. Red,yellow, Orange,Green, Indigo, Blue, Violet
  4. Violet, Blue,Indigo,Green,Orange,yellow,Red