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IMSO 2011 Science International – Theory I

Question 1

Study the pictures below. In each case, write whether it is potential energy or kinetic energy.

Question illustration

Question 2

Beginning from largest to smallest, arrange the following levels of biological organization: population, biosphere, cell, biomolecule, organ system, organism

Question 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?
  1. Pluto is not spherical in shape.
  2. Pluto does not orbit the Sun like other planets.
  3. It is too far away from the Sun.
  4. It is not the dominant object in its area of the Solar System.

Question 4

Which of the following colloidal system is not correctly paired based on the type of solute and dispersion medium?
  1. sol : a solid dispersed in another solid or liquid
  2. foam : a gas dispersed in a liquid
  3. aerosol : a liquid dispersed in another liquid or solid
  4. gel : a semi-solid colloid with high viscosity, a continuous network of solid throughout a liquid medium

Question 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?

Question 6

The Earth takes around 365 days to complete one whole revolution around the Sun. This results to
  1. the occurrence of different seasons.
  2. the rising and setting of the Sun.
  3. the occurrence of spring and neap tides.
  4. the occurrence of solar and lunar eclipses.

Question 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
  1. compact fluorescent lamp.
  2. fluorescent lamp.
  3. incandescent lamp.
  4. light emitting diode lamp.

Question 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?

Question 9

In what flower part does pollination takes place?
  1. anther
  2. filament
  3. stigma
  4. style

Question 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.

Question 11

When you are drinking ice cold water, ice normally floats in water. What is the reason for this?

Question 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.

Complete the table by giving the letters for (1) melting, (2) sublimation, (3) vaporization, (4) deposition, (5) condensation, (6) freezing.

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Question 13

In every ecosystem, decomposers are important component in every food chain. Decomposers benefit an ecosystem by
  1. controlling the population.
  2. manufacturing energy.
  3. returning nutrients to the soil.
  4. removing toxic substance.

Question 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?

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Question 15

Transpiration is the water evaporation from different plant parts. The following are the functions of transpiration in plants EXCEPT
  1. cooling of leaves.
  2. excretion of minerals.
  3. uptake of minerals.
  4. uptake of water.

Question 16

What type of asexual reproduction was illustrated in the figure given?

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  1. binary fission
  2. budding
  3. fragmentation
  4. regeneration

Question 17

Atoms are considered to be the building blocks of nature. However, it is still composed of sub-atomic particles such as protons, electrons and neutrons. Which among the following statements is true?
  1. Protons have the same mass as a neutron and have no charge.
  2. Electrons are lighter than neutrons but heavier than protons.
  3. Neutrons have the same mass as an electron but have no charge.
  4. Protons are heavier than electrons and have a positive charge.

Question 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?
  1. yellow and blue
  2. green and red
  3. red and blue
  4. green and violet

Question 19

All cells of the human body except reproductive cells undergo mitosis to reproduce. Which of the following best describes mitosis?
  1. An increase in the number of cells without changing the chromosome number of new cells.
  2. Is a means of sexual reproduction.
  3. Results in new cells which are completely different from their parent cell.
  4. Is not affected by the size of reproducing cells.

Question 20

What is the only method of heat transfer that does not require the presence of a medium?