LET Reviewer - GenEd - Natural Science Part-3 (50 Items)

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NATURAL SCIENCE 3

1) How does hormones work?
a. by releasing adrenaline
b. by controlling cell chemistry
c. by regulating water loss
d. by controlling blood pressure

2) Nitrogen compounds known as the building blocks of proteins.
a. enzymes
b. glucose
c. nutrients
d. amino acids

3) The growth of roots towards water is an example of?
a. chemotropism
b. geotropism
c. hydrotropism
d. phototropism

4) DNA means?
a. data nurturing analysis
b. deoxytribonucleic acid
c. deoxyribonucleic acid
d. deotrixyl nucleic acid

5) What are the 3 products of oxygen when it has been burned?
a. water, carbon dioxide and air
b. energy, water and carbon
c. energy, carbon and oxide
d. energy, air and water

6) In flowering plants, fertilization takes place in the?
a. pollen tube
b. stamen
c. ovules
d. pollen grain

7) The development of egg without fertilization is called:
a. mitosis
b. parthenogenesis
c. spermatogenesis
d. mitochondria

8) The smallest part of a living thing which performs all the processes a living organism does.
a. organ
b. cell
c. tissue
d. system

9) Male and female reproductive parts of a flower:
a. pollen grains and ovules
b. stamen and pistil
c. pollen grain and pistil
d. stamen and ovules

10) These are cellular secretions which help regulate the breakdown and buildup of various substances in the body.
a. enzymes
b. amino acids
c. plasma
d. hormones

11) Which of the following does NOT occur to both respiration and fermentation? a. energy is released
b. sugar is broken down
c. carbon dioxide is produced
d. alcohol is formed

12) What will cause the process of respiration to stop?
a. absence of oxygen
b. absence of sunlight
c. decrease in water supply
d. presence of sunlight

13) What relationship exist between a bangus and tilapia in the fishpond?
a. commensalism
b. mutualism
c. competition
d. predation

14) Taxonomy is the study of the classification of organism based on their?
a. genetics
b. evolutionary history
c. development pattern
d. habitat

15) Coordination and integration of the body activities of man are under the direct control of the?
a. reproduction and transport system
b. nervous and endocrine system
c. nervous and excretory system
d. respiratory and endocrine system

16) Which of the following is NOT a compound?
a. acetic acid
b. alcohol
c. magnesium
d. zinc oxide

17) A molecule is said to be polar or dipolar if?
a. its positive and negative charges are at different places
b. it possesses polar bonds
c. its polar bond have unsymmetrical charge distribution
d. all of the above

18) Instrument which measures the specific gravity of liquids.
a. hygrometer
b. synchrometer
c. hydrometer
d. cyclotron

19) Which property does NOT identify a chemical system?
a. melting point
b. boiling point
c. taste
d. shape

20) The process of spreading out spontaneously to occupy a space uniformly.
a. compression
b. diffusion
c. expansion
d. pressure

21) It is the complex mixture of pollutants. a. acid rain b. particles c. oxides d. oxidants

22) Compounds with the same molecular formula but with different structural formulas.
a. cellulose
b. isomers
c. polymers
d. monomers

23) Describes the force of gravity of an object.
a. mass
b. weight
c. capacity
d. pressure

24) When gaseous molecules are compressed, they tend to?
a. increase in volume
b. decrease in volume
c. repel each other
d. attract and liquefy

25) The average temperature was recorded at 35 degrees C. What is the equivalent in Kelvin?
a. 308
b. 300
c. 273
d. 360

26) It is the distance traveled by the body per unit time and tells how fast or slow the body moves.
a. velocity
b. speed
c. acceleration
d. thrust

27) The pressure cooker works under the principle that?
a. boiling point increases as pressure decreases
b. boiling point decreases as pressure increases
c. freezing point increases as pressure increases
d. freezing point increases as pressure decreases

28) It is the phenomena in which energy is transferred through vibrations.
a. frequency
b. waves
c. refraction
d. amplitude

29) The unit of measurement for intensity of sound:
a. hertz
b. decibel
c. angstrom
d. frequency

30) The term RADAR is derived from the phrase?
a. Radio Detection and Ranging
b. Radiation Diffusion and Ranging
c. Radio Diffraction and Resolution
d. Radiation Diffraction and Resolution

31) LASER is derived from the phrase?
a. Light Amplification by Stimulated Emission of Radiation
b. Light Application by Simulated Emission of Radiation
c. Light Amplification by Simulated Ejection of Radiation
d. None of the above

32) What is the color of a transparent substance?
a. the color of the light it absorbs
b. the color of the light it reflects
c. the color of the light it transmits
d. the color of the light in it

33) What will make an object move in a circular path?
a. central force
b. gravitational force
c. frictional force
d. electromagnetic force

34) The temperature at which gas would no longer exert pressure.
a. Kelvin temperature
b. Celsius temperature
c. Absolute zero
d. Boiling point

35) At what temperature does water have the smallest volume and greatest density? a. 0 degree C
b. 2 degrees C
c. 4 degrees C
d. 16 degrees C

36) A projectile always travels in a ________.
a. linear path
b. circular path
c. parabolic path
d. a and a

37) To earth scientists, the most important features on the map are the landforms that shape the earth's surface that is shown in:
a. hydrographic maps
b. geologic maps
c. political maps
d. topographic maps

38) What causes high and low tides?
a. earth's rotation on its axis
b. sun's solar energy
c. moon's gravitational pull
d. earth's gravitational pull

39) How is coral atoll formed?
a. volcanic eruptions
b. corals growing around a volcanic island
c. underwater bedrock formations
d. earthquake

40) When you pass orange juice from a tetra pack into a glass, the juice changes its?
a. volume
b. shape
c. state
d. all of the above

41) The part of the atmosphere that filters the ultraviolet rays of the sun?
a. stratosphere
b. troposphere
c. ozone layer
d. ionosphere

42) The point in the earth's orbit which is nearest the sun.
a. solstice
b. eclipse
c. aphelion
d. perihelion

43) What is the primary function of gravity in the universe?
a. provision for energy
b. keep the stars and heavenly bodies in orbit
c. causes movement in space
d. part of universal design

44) What does the word "monsoon" mean?
a. moon will come soon
b. atmosphere
c. seasons
d. climate

45) It occurs when the earth is between the sun and the moon, with the earth's shadow cast over the moon.
a. total eclipse
b. lunar eclipse
c. eclipse
d. partial eclipse

46) A root may perform all of the following functions, EXCEPT:
a. photosynthesis
b. anchorage
c. food storage
d. water absorption

47) What would be the best way to prevent soil erosion in a hill?
a. building terraces
b. cultivation
c. reforestation
d. irrigation

48) Process in removing excess odor in water.
a. sedimentation
b. chlorination
c. distillation
d. aeration

49) One of the planets has the greatest gravitational pull. Which one is it?
a. Mars
b. Earth
c. Mercury
d. Jupiter

50) He evolved the Theory of Evolution in his book "Origin of Species"?
a. Albert Einstein
b. Charles Darwin
c. Johannes Kepler
d. Isaac Newton

NATURAL SCIENCE (6) - ANSWERS:

1. B 2. D 3. C 4. C 5. B 6. C 7. B 8. B 9. B 10. D 11. D 12. A 13. C 14. B 15. B 16. C 17. D 18. C 19. C 20. B 21. D 22. B 23. B 24. A 25. A 26. B 27. A 28. B 29. B 30. A 31. A 32. C 33. A 34. C 35. C 36. C 37. D 38. C 39. B 40. B 41. C 42. D 43. C 44. C 45. B 46. A 47. A 48. D 49. D 50. B

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