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IMSO 2016 Science International - Theory I

Question 1

Figure of world population and cumulative deforestation, 1800-2010.

Deforestation rate has been slower than population growth since ….

Question illustration
  1. 1840
  2. 1920
  3. 1950
  4. 1990

Question 2

A molecule of carbon dioxide leaves a muscle cell in your leg and enters the blood in a capillary bed. On its way to leaving the body via exhaled air, it passes through the following structures, EXCEPT …
  1. The right atrium
  2. An alveolus
  3. A pulmonary vein
  4. A vena cava

Question 3

In a creative experiment, grade five students examined effects of different kinds of packed fruit juice on chicken bone. They provide equal amount of different kinds of fruit juice and measure their pH with pH indicator. They collected the chicken bones, and put equal mass of chicken bone in each fruit juice for a month. To prevent juices evaporation they used suitable tight flasks. At the end of the time they measured the mass of each flask bone with a digital scale.

pH for each fruit juice is measured using pH indicator:

| Fruit juice 1 | Fruit juice 2 | Fruit juice 3 | Fruit juice 4 |
| --- | --- | --- | --- |
| 2 | 6 | 4 | 7.5 |

Due to the experiment, which diagram shows the chicken bones mass correctly?

Question illustration
  1. Graph A
  2. Graph B
  3. Graph C
  4. Graph D

Question 4

Observed the picture below about Filariasis (Elephantiasis).

Which of the following statements is FALSE?

A. Filariasis is a disease spread by a mosquito

B. Wuchereria bancrofty can destruct human life cycle

C. Wuchereria bancrofty clogs lymph vessel

D. Filariasis will appear in human if an enlargement of leg is visible

Question illustration

Question 5

Which of the following IS NOT a natural cloning?
  1. New organism of Planaria after its fragmentation.
  2. Process of making muscle cell from zygote
  3. New organism of star fish that grows from one part of its body.
  4. Binary fission in bacteria

Question 6

The picture below shows Liger; hybridization of male lion and female tiger.

What is the main reason that Liger is not assumed as a new species?

A. Because liger still looks similar with lion and tiger

B. Because liger still has a parental characteristics

C. Because liger can only mating with another liger to produce an offspring

D. Because liger is a sterile organism and cannot produce any offspring

Question illustration

Question 7

A biology teacher gave her students a culture of colourless unicellular organisms to study. The students observed that each cell was about 100 µm diameter, had a single nucleus, was rectangular in shape, and did not burst when placed in a hypotonic solution. There are some statements related to those explanations:

i. They were bacteria

ii. They were eukaryotic.

iii. They were animal cells.

iv. They probably had a cell wall outside of the cell membrane.

v. The organisms were cells that normally grew in salt water.

Which statements about these organisms are supported by the observations?
  1. ii and v
  2. ii, iii, and iv
  3. ii, iii, and v
  4. ii and iv

Question 8

The human circulatory system is described as a closed circulation.

The picture shows the circulatory system in a different organism. The arrows show the direction of blood flow in the vessels.

How is the circulatory system in this organism described …

Question illustration
  1. Closed double system
  2. Closed single system
  3. Open double system
  4. Open single system

Question 9

In a culture of Amoeba in a laboratory, environmental condition is maintained constant at 29 °C and food is constantly added, while toxic waste is discarded. Which of the following graphs shows the pattern growth of that Amoeba population?

A. Graph A

B. Graph B

C. Graph C

D. Graph D

Question illustration

Question 10

Which part of the picture below has the least amount of chlorophyll?

A. Palisade mesophyll cell

B. Bundle sheat cell

C. Spongy mesophyll cell

D. Guard cell

Question illustration

Question 11

According to these statements

(1) The value of gravitational acceleration in the liquid increases with depth.

(2) The density of the liquid increases with depth.

(3) The pressure in the liquid increases with depth.

(4) The density of the body differs from that of liquid.

Which statement(s) is/are related to physical reasons for up thrust exerted by a fluid that opposes the weight of an immersed body in a liquid?

A. (1) and (3)

B. (2) and (4)

C. (2)

D. (4)

Question 12

The figure illustrates a diving athlete.

Which is the correct graph that show relation between gravitational acceleration and time?

Question illustration

Question illustration
  1. Graph A
  2. Graph B
  3. Graph C
  4. Graph D

Question 13

A series of four wires with equal lengths but different cross-section areas of 1 mm², 2 mm², 3 mm² and 4 mm² is connected to a 25 Volt source. What is the potential difference across the 2 mm² wire?

A. 2.50 Volt

B. 5.00 Volt

C. 7.50 Volt

D. 10.0 Volt

Question 14

The diagram below shows the position of a lamp and a thermometer.

The processes explain heat energy transfer from the lamp to the thermometer are

Question illustration
  1. Conduction: no; Convection: no; Radiation: yes
  2. Conduction: no; Convection: yes; Radiation: yes
  3. Conduction: yes; Convection: yes; Radiation: no
  4. Conduction: no; Convection: yes; Radiation: no

Question 15

The diagram below shows two light rays passing through two lenses (X and Y)

What are X and Y respectively?

Question illustration
  1. Concave lens; Concave lens
  2. Convex lens; Concave lens
  3. Concave lens; Convex lens
  4. Convex lens; Convex lens

Question 16

The graph below presents a motion of an object

The graph shows the variation with time of the gravitational potential energy (PE) and the kinetic energy (KE). Which of the following statements is the best conclusion according to the graph?

Question illustration
  1. An object is moving downward at constant acceleration
  2. An object is moving downward at constant speed
  3. An object is moving upward at constant acceleration
  4. An object is moving upward at constant speed

Question 17

The figure below shows a ball sliding from the end of a table to the ground.

The net force act on the ball at point T (the air friction neglected) is…

Question illustration
  1. Left
  2. Right
  3. Down
  4. Down and right

Question 18

The following figure shows the process of inducing current and electromotive force by moving conductive wire across magnetic field lines.

According to the figure, the common device which produces electric power is called…

Question illustration
  1. AC Generator
  2. DC Generator
  3. AC Motor
  4. DC Motor

Question 19

The figure below shows a movement of tectonic plates at Sumatra Island

Tectonic plates that move away each other is called…

Question illustration
  1. Convergent
  2. Divergent
  3. Subduction
  4. Obduction

Question 20

Study these statements below

(1) Moon is outside of the gravitational influence of the Earth.

(2) Moon is in balance with the gravitational forces from the Sun and other planets.

(3) The net force on the Moon is zero.

(4) The gravitational force exerted by the Earth on the Moon provides a net force that causes the Moon’s centripetal acceleration.

Which statement(s) can explain why the moon prefers in its orbit around the Earth rather than falling to the Earth?
  1. (1)
  2. (1) and (3)
  3. (2) and (4)
  4. (4)