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Science DIAGNOSTIC / COMPREHENSIVE test

Science DIAGNOSTIC / COMPREHENSIVE test. Pen Roces Young Einstein Learning Center. 1. Which of the following is not true about the scientific method:. Experimentation will always give a positive result It is designed in such a way to prevent bias

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Science DIAGNOSTIC / COMPREHENSIVE test

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  1. Science DIAGNOSTIC / COMPREHENSIVE test Pen Roces Young Einstein Learning Center

  2. 1. Which of the following is not true about the scientific method: • Experimentation will always give a positive result • It is designed in such a way to prevent bias • It requires a hypothesis that serves as a guide in planning experiments • Sometimes the hypothesis needs to be revised

  3. 2. Which of the following is not true about eclipses: • The earth is between the moon and the sun in a lunar eclipse • There should be a full moon during a solar eclipse • An eclipse occurs when a body passes through a shadow • All of these are true

  4. 3.  An experiment to determine the effect of the amount of iron on the magnetic properties of a solid metallic object is being designed. What is the independent variable? • Magnetic property • Amount of other metals in the object • Metallic property • Amount of iron

  5. 4. Based on the experiment described in number 3, data shows that an increase in amount of iron results in an increase in the magnetic property of metallic solids, which of the following is a viable conclusion for the experiment? • All metals are metallic • The amount of iron does not affect the magnetic property of a material • The magnetic property is inversely proportional to the amount of iron • None of the above

  6. B C D 5. Which of the following graphs will show the relationship of the amount of iron and magnetic property? a. b. c. d. Amount of Iron  Magnetic Property

  7. 6. An object of unknown density is placed in a beaker filled to the brim with 100 ml of water. After removing the object, the volume of water that remains is 67 ml. If the object weighs 66 g, what is the density of the object? • 1 g/ ml • 1.5 g/ml • 2 g/ml • cannot be determined m Given: Volume = 100-67= 33ml mass = 66g D V D= m/V= 66g/33ml = 2g/ml

  8. 7. Which of the following does not describe the Prime meridian? • It is also known as the Greenwich Meridian It requires a hypothesis that serves as a guide in planning experiments • It is used as the reference point to determine the angular distance of points east or west of it on the earth’s surface • It passes through the Royal Greenwich Observatory • It is also known as the International Date Line

  9. 8. The formation of igneous rocks to Metamorphic rocks involves the following except: a. Melting b. High pressure c. Weathering d. High heat

  10. 9. The thinnest layer of the earth is the • mantle • crust • Inner core • Outer core

  11. 10. Which of the following is not a result of plate tectonics? • volcanoes • mountains • earthquakes • fossils

  12. 11. During a hot summer day, a boy along a river notices that the ground is warmer than the water, this means that • water has a higher specific heat as compared to the ground • water has a lower specific heat as compared to the ground • the ground absorbs more heat during the night • the ground absorbs heat much faster than water

  13. 12. A red blood cell was placed in a solution of unknown concentration. After some time, the cell was found to have less water, this means that • The solution has less solutes • The solution has more solutes • Solutes went out of the cell • Solutes went into the cell OSMOSIS, water diffuses from a hypotonic (low solute concentration) solution to a hypertonic (high solute concentration) solution.

  14. 13. In which group will you find organisms that are more closely related than organisms found in the same order? • Kingdom • Phylum • Class • Family Kingdom-Phylum-Class-Order-Family-Genus-Species

  15. 14. Which type of plant tissues are found in the tips of stems and roots? • Cambrium • Meristematic • Conducting • Protective

  16. 15. DNA has the following Characteristics except • It is double-stranded • It is made up of nucleotides • The bases are exposed • The two strands are twisted

  17. 16. You found out one morning that your pet dog has fleas. What kind of ecological association is this? • Parasitism • Commensalism • Mutualism • Predation

  18. 17. When a macromolecule such as protein has been produced in the cell, in what cell organelle will it be packaged for transport? • Nucleus • Golgi Aparatus • Secretory Vesicles • Endoplasmic reticulum

  19. 18. Two mongo seeds were planted in two separate boxes. One box was placed outside and the plant grew upright. One box had all the sides covered except for a small hole on the right side of the box. Due to phototropism, one could infer that: • The plant will grow upright • The plant will grow bent to the left • The plant will grow bent to the right • The plant will not grow

  20. E F Q G R H S T 19. Organisms H and T are most probably • Decomposers • Producers • Consumers • Cannot be determined

  21. E F Q G R H S T 20. When organism G becomes extinct, which of the following could happen? • Organisms F could also become extinct • OrganismQ will have less food • Organism H will thrive • All of these

  22. E F Q G R H S T 21. Which organisms are likely to be carnivores? • F and T • G and R • Q and E • G and S

  23. 22. The seed color of a certain plant is either yellow or green. A yellow seeded plant was crossed with a green seeded plant, and all the offspring had yellow seeds. Which of the following is true? • All offspring are homozygous • The yellow color is recessive • The offspring had the green gene • Green gene is dominant

  24. 23. If from the same plant in Number 22, a heterozygous plant is crossed with another heterozygous plant, what is the probability of obtaining a yellow seeded plant? • 75% • 25% • 50% • 100%

  25. 24. Our body continuously replaces old cells with new ones but when cells continuously divide and grow too fast, these are now what we call cancer cells. Cancer cells proliferate via: • Mitosis • Meiosis • Mitosis and Meiosis • It would vary

  26. 25. Which of the following is not a product of photosynthesis? • Carbon dioxide • Starch • Oxygen • None of these

  27. 26. Which of the following is a pure substance? • Toothpaste • Silver nitrate • Urine • wood

  28. 27. Which of the following is a homogenous mixture? • Rockyroad ice cream • Brass • Baking Soda • Water

  29. 28. If boron acquires a +3 charge, this means that • It gained electrons • It has five protons and five electrons • It has five protons and two electrons • It has two protons and five electrons • Will result to a (-) charge • Net Charge = (+5) + (-5) = 0 • Net Charge = (+5) + (-2) = +3 • Net Charge = (+2 + (-5) = -5

  30. 29. Boron actually exists in two isotopes, B-10 and B-11. These isotopes will have • The same number of neutrons • different number of electrons • The same number of protons • different valency An isotope is an element composed of atoms that contain a different number of neutrons compared to the basic element.

  31. 30. If boron (with a +3 charge) combines with chloride to form boron chloride, which is the correct chemical formula: • BCl • BCl2 • BCl3 • B2Cl3

  32. 31. Element X has an atomic number of 17, therefore it has a. 2 energy levels and 1 valence electron b. 3 energy levels and 7 valence electrons c. 3 energy levels and 1 valence electrons d. 2 energy levels and 7 valence electron

  33. For numbers 32 to 34, refer to the following equation:AlCl3 + LiH → AlH3 + LiCl32. When the equation is balanced, the coefficients of Alcl3 is: a. none of these b. 3 c. 8 d. 6 AlCl3 +3LiH → AlH3 + 3LiCl

  34. For numbers 32 to 34, refer to the following equation:AlCl3 + LiH → AlH3 + LiCl33. When two moles of AlCl3 is consumed, how much LiCl will be formed • 12 • 6 • 3 • 2 AlCl3 +3LiH → AlH3 + 3LiCl 2 : 6 2 : 6

  35. For numbers 32 to 34, refer to the following equation:AlCl3 + LiH → AlH3 + LiCl 34. If there are 3 moles of AlCl3 and 3 moles of LiH, after the reaction which of the two reactants will have an excess amount? • AlCl3 • LiH • both will have an excess • both will be consumed completely AlCl3 +3LiH → AlH3 + 3LiCl if all 3AlCl3 is consumed, there is not enough LiH 3 : 9 : 3 : 9 AlCl3 +3LiH → AlH3 + 3LiCl if all 3LiHis consumed there will be excess of 2 AlCl3 1 : 3 : 1 : 3

  36. 35. acids change the color of blue litmus paper to red. Which of the following substances will not show this reaction • pH = 4.0 • pOH = 4.0 • a solution rich in H+ • a substance that dissociates to form H+ pH = 14- pOH = 14-4 = 10 ph of 10 is basic

  37. 36. The solubility of NACl in water at 20ºC is 10 g per 100 ml of water, if 12 g is added and it produces a heterogenous solution, this solution is: • Unsaturated • Saturated • Supersaturated • Diluted • * A heterogenous solutionmeans some are dissolved (10 g) some are undissolved (2), so the solution is supersaturated.

  38. 37. The magnitude of the velocity of an object, in a span of 4 seconds was changed from 8 m/s to 14 m/s. What was the object’s acceleration? a = Δv/ Δt = (14 m/s – 8 m/s) / 4 s = 6 m/s / 4s = 1.5m/s2 Answer is d. 1.5m/s2

  39. 38. A ball is thrown up into the air. As it goes up, which of the following increases? a. Potential energy b. Kinetic energy c. Mechanical energy d. None of the above PE = mgh since as it goes up, h increases so potential energy increases. Answer is a. Potential energy

  40. 39. What happens to kinetic energy if the velocity is reduced by half (KE = ½ mv2) So KE2 = ½ m (1/2 v)2 ` = ½ m (1/4 v2) = ¼ (½ mv2) Answer is a. It is reduced to ¼ of the original

  41. 40. Which of the following does not show a change in acceleration? • A car slowing down • A car speeding up • An object in uniform circular motion • none of these Answer: d

  42. 41. The force acting on an object in uniform circular motion • tangent to the circle • along the circumference of the circle • directed to the center • directed to the sides displacement • Answer: b

  43. 42. Object A has a mass of 2 Kg, while object B has a mass of 4 Kg, as they fall • Object B will hit the ground first • The potential energy of object A increases • The KE of object B increases (since v increases as it falls) • All of these • Answer: c

  44. 43. Jupiter’s gravitational pull is 24.9 m/s2 and on the Earth’s Moon it is 1.6 m/s2. If Object A has a mass of 2 Kg on earth, which of the following is true • The mass of the object will be the same in Jupiter and in the moon. • The object will weigh less on Jupiter (W = mg) • The object will fall slower in Jupiter • None of these • Answer: a

  45. 45. Two people pushed a 10 N box, 2 meters to the right. How much work was done by each person if each exerted an equal amount of force?(W = Fd) • 0 J • 5 J • 10 J • 20 J • Answer: b

  46. 45. A man is pushing a rock with a force of 50 N. If the rock has a weight of 98 N, How much force is the rock exerting on the man? • 48 N • 50 N • 98 N • 148 N * For every action there is an equal and opposite reaction Answer: B

  47. 46. Based on the previous number how much force should the man exert in order to move the rock? • 48 N • 50 N • 98 N • 148 N *Any force greater than 98 N Answer: d

  48. A B C D 47. Which shows the movement of a car that is speeding up? • Answer is b.increasing

  49. 48. Which shows the movement of a car with constant velocity? • Answer is a. flat line means constant

  50. 50. Which shows the velocity of a freely falling object? Answer is: b. as the object falls due to gravity, v increases

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