science olympiad

1. Study the pictures below.

In each case, write whether it is

potential energy or kinetic energy.

A

B

C

D

E

F

[Score:3; 0.5 each]
ANSWER:
A. kinetic or potential energy

D. kinetic energy

B. potential energy

E. kinetic or potential energy

C. kinetic or potential energy

F. potential energy

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2. Beginning from largest to smallest, arrange the following levels of biological

organization:

population,

biosphere,

cell,

biomolecule, organ system, organism
[Score: 1]
ANSWER: biosphere – population – organism – organ system – cell - biomolecule

3. In 2006, the International Astronomical Union demoted Pluto from a status of a major planet to a dwarf planet. What is the main reason for this?
A. Pluto is not spherical in shape.
B. Pluto does not orbit the Sun like other planets.
C. It is too far away from the Sun.
D. It is not the dominant object in its area of the Solar
System.
[Score: 1]
ANSWER: D. It is not the dominant object . . .

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4. Which of the following colloidal system is not correctly paired based on the type of solute and dispersion medium?
A. sol : a solid dispersed in another solid or liquid
B. foam : a gas dispersed in a liquid
C. aerosol : a liquid dispersed in another liquid or solid
D. gel : a semi-solid colloid with high viscosity, a continuous network of solid throughout a liquid medium [Score: 1]
ANSWER: C. aerosol : a liquid dispersed in another . . .
5. All living things maintain stable internal conditions. Human beings like us adapt to the changes in our environment so that the conditions of our body function well.

What is this

character of living things called?
[Score: 1]
ANSWER: Homeostasis
6. The Earth takes around 365 days to complete one whole revolution around the Sun. This results to
A. the occurrence of different seasons.
B. the rising and setting of the Sun.
C. the occurrence of spring and neap tides.
D. the occurrence of solar and lunar eclipses.
[Score: 1]
ANSWER: A. the occurrence of different seasons.
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7. Some governments around the world have passed measures to phase out tungsten filament bulbs for lighting purposes. The aim is to encourage the use of more energy-efficient lighting alternatives and minimize greenhouse gas emissions.

A

tungsten filament refers generally to
A. compact fluorescent lamp.
B. fluorescent lamp.
C. incandescent lamp.
D. light emitting diode lamp.
[Score: 1]
ANSWER: C. incandescent lamp.
8. According to the law of conservation of energy, energy is neither created nor destroyed but is transformed from one form to another. What energy transformation is involved when an attached object to a compressed spring is released?
[Score: 1]
ANSWER: elastic potential energy to kinetic energy potential energy to kinetic energy (0.5 pts)
9. In what flower part does pollination takes place?
A. anther
B. filament
C. stigma
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D. style
[Score: 1]
ANSWER: C. stigma

10. Baseball players try to hit the ball with their bat. Why do they try to hit the ball as strongly as they can?
A. So that the bat will have greater chances of hitting the ball. B. So that the ball will travel farther into the field.
C. So that the ball will fly higher into the field.
D. So that the ball will fly faster into the field.
[Score: 1]
ANSWER: B. So that the ball will travel farther . . .

11. When you are drinking ice cold water, ice normally floats in water. What is the reason for this?
[Score: 1]
ANSWER: - water is denser than ice
- water has higher density than ice
- ice is less dense than water

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12. When a substance changes from one state or phase of matter to another, it is said to have undergone a change in phase. These changes of phase always occur with a change in the amount of heat of the substance. The figure below summarizes the movement of heat during phase change.

GAS
B

A

E

LIQUID
C

F

D
SOLID

Complete the table by writing the letter that corresponds to the given phase change of matter.
[Score: 3; 0.5 each]
Phase Change

Letter Corresponding

1. Melting

C

2. sublimation

E

3. vaporization

A

4. deposition

F

5. condensation

B

6. freezing

D
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13.

In every ecosystem, decomposers are important component in every food chain. Decomposers benefit an ecosystem by
A. controlling the population.
B. manufacturing energy.
C. returning nutrients to the soil.
D. removing toxic substance.
[Score: 1]
ANSWER: C. returning nutrients to the soil.

14.

Mayon Volcano is considered to be the most perfect cone in the Philippines. It is an active volcano that was formed from layers of pyroclastic flows and lava from previous eruptions.
What is the classification of
Mayon Volcano according to its structure? [Score: 1]
ANSWER: stratovolcano or composite volcano

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15.

Transpiration is the water evaporation from different plant

parts.

The following are the functions of transpiration in

plants EXCEPT
A. cooling of leaves.
B. excretion of minerals.
C. uptake of minerals.
D. uptake of water.
[Score: 1]
Answer: B. excretion of minerals.

16.

What

type

of

asexual

reproduction was illustrated in the figure given?
A. binary fission
B. budding
C. fragmentation
D. regeneration
[Score: 1]
ANSWER: A. binary fission

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17.

Atoms are considered to be the building blocks of matter.

However, it is still composed of sub-atomic particles such as protons, electrons and neutrons. Which among the following statements is true?
A. Protons have the same mass as a neutron and have no charge. B. Electrons are lighter than neutrons but heavier than protons. C. Neutrons have the same mass as an electron but have no charge. D. Protons are heavier than electrons and have a positive charge. [Score: 1]
ANSWER: D. Protons are heavier than electrons . . .
18.

Members of your family gather every Sunday afternoon at

the indoor garden of your house. What color of the glass panel would you suggest to use in order to lower the intensity of sunlight inside the garden without compromising the efficiency of photosynthesis of the plants?
A. yellow and blue
B. green and red
C. red and blue
D. green and violet
[Score: 1]
ANSWER: C. red and blue
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19.

All cells of the human body except reproductive cells

undergo mitosis to reproduce.

Which of the following best

describes mitosis?
A. An increase in the number of cells without changing the chromosome number of new cells.
B. Is a means of sexual reproduction.
C. Results in new cells which are completely different from their parent cell.
D. Is not affected by the size of reproducing cells.
[Score: 1]
ANSWER: A. An increase in the number of cells without . . .

20.

What is the only method of heat transfer that does not

require the presence of a medium?
[Score: 1]
ANSWER: radiation
21.

The table below shows the boiling point and freezing point

of the three substances.
Substance

Boiling Point

Freezing Point

A

350°C

100°C

B

350°F

50°F

C

350 K

263 K

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A. Which substance has the highest boiling point?
[Score: 1]
ANSWER: substance A
B. Which substance has the lowest freezing point?
[Score: 1]
ANSWER: substance C

22.

Urine is an amber colored fluid which is made of toxins,

urea, water and mineral salts. Which of the following set of organs are directly involved in the production and excretion of urine? A. heart – liver – nerves
B. kidney – small intestines – liver
C. liver – kidney – urinary bladder
D. lungs – liver – kidney
[Score: 1]
ANSWER: C. liver – kidney – urinary bladder
23.

Which state of matter will sound travel the fastest?
[Score: 1]
ANSWER: solid

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24.

Chloroflourocarbons (CFCs) and methyl bromide are some

of the substances that contribute to ozone depletion.

What

layer in the atmosphere is the ozone located?
[Score: 1]
ANSWER: stratosphere
25.

Which of the following is not considered as greenhouse gas?
A. carbon dioxide
B. methane
C. nitrogen
D. water vapor
[Score: 1]
ANSWER: C. nitrogen

26.

In the figure below, a 8 kg weight is place at one end of a

rod. How far should a 5 kg weight be placed from the fulcrum to balance the 8 kg weight?

8 kg

10 cm

[Score: 1]
ANSWER: 16 cm
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27.

A mixture of methane and carbon dioxide produced by

microbial degradation of organic matter and used as fuel is called A. alcogas.
B. biogas.
C. fossil fuel.
D. syngas.
[Score: 1]
ANSWER: B. biogas

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