Grade 11-12 Physical Science Q3 RUQA PDF

Score Regional Unified Quarterly Assessment Third Quarter SCIENCE 11 – Physical Science Name Date Section...

Score Regional Unified Quarterly Assessment Third Quarter SCIENCE 11 – Physical Science Name Date Section Division School Direction: Encircle your best answer. 1. What kinds of elements have atomic numbers greater than Uranium? a. alkaline earth metals c. noble gases b. metals d. transuranium elements 2. What’s the term for stars that are nine times bigger than our Sun? a. massive stars b. nebulae c. stars d. supernova 3. Who developed the latest model of the atom which is accepted today? a. Ernest Rutherford b. J.J. Thomson c. John Dalton d. Niels Bohr 4. What does adding neutrons to atoms make? a. a new compound c. a new isotope b. a new element c. None of the choices 5. What serves as the identity of an atom? a. number of electron b. number of positron c. number of proton d. none of the choices 6. The following atoms participate in hydrogen bonding EXCEPT: a. C b. F c. O d. N 1 7. Dissolving sodium chloride in water results to what type of intermolecular interaction? a. Dipole-dipole c. Ion-dipole b. Hydrogen bond d. London Dispersion 8. Amino acids in proteins are joined together by __________ a. Glycosidic bond c. Hydrogen bond b. Metallic bond d. Peptide bond 9. Which of the statements below DOES NOT describe an enzyme? Enzymes _________. a. are proteins c. catalyzes a reaction b. are being used up during the reaction d. speed up a reaction 10. It contains an unsaturated fatty acid commonly found in plants and is liquid at room temperature. This lipid being describe is___________. a. Fats b. Steroids c. Oils d. Wax 11. Which statement best describes the Collision theory? a. All collisions lead to chemical reactions. b. Most collisions lead to chemical reactions. c. Very few reactions involve particle collisions. d. Effective collisions lead to chemical reactions. 12. Which is/are necessary for successful collisions to occur? I. Favorable collision geometry. II. Sufficient kinetic energy. III. Large change in enthalpy (∆H). a. I only c. I and II only b. II and III only d. I, II and III 13. Which of the following will decrease the number of effective collisions during a chemical reaction? a. Adding a catalyst. b. Decreasing the temperature. c. Increasing the surface area. d. Increasing reactant concentrations. 14. Which of the following will increase the reaction rate? a. Adding a catalyst  b. Decreasing temperature c. Using lumps instead of powder d. Decreasing the concentration of an acid 15. What does the effect of temperature rise on reaction rate? a. It increases molecular concentration and slows reaction rate. b. It increases the number of effective collisions among reactants, thus increasing the reaction rate. c. It decreases the system's energy and limits how much further reaction can take place. d. It decreases the number of collisions and the energy of molecules to limit further reaction. 16. Your science teacher demonstrates an interesting chemical reaction in your class. The teacher dissolves zinc strips in a container with concentrated hydrochloric acid. The teacher then added more hydrochloric acid in the container and added more pieces of zinc strips. What factor will NOT affect the reaction rate? a. The amount of hydrochloric acid. b. The concentration of reactants. c. The surface area of the Zinc. d. The size of the container. 17. When the concentration of reactant molecules increases, the rate of reaction increases. What is the best explanation for this? As the reactant concentration increases ________. a. the rate constantly increases. b. the activation energy increases. c. the average kinetic energy of molecules increases. d. the frequency of molecular collisions increases. 18. What does a catalyst do? a. Stabilizes a reaction b. Cools the reaction down c. Increases the rate of reaction d. Increases the concentration of the reaction 19. Which helps to speed up a reaction but does not take part in the chemical reaction? a. Catalyst b. Coefficient c. Combustion d. Reactants 20. What cleaning agent is used in cleaning to destroy bacteria and viruses? a. Acid b. Decreases c. Disinfectant d. Water 21. What active ingredient plays the key role of cleaning the materials to prevent diseases brought by bacteria and viruses? a. Antimicrobial Agent b. Bleach Activators c. Colorant d. Enzymes 22. How does the enzyme improve the quality of a paper sheet? a. It makes it whiter b. It makes it more writable c. It makes it stronger and thicker d. It makes the paper colorful 23. Which of the following is NOT a carcinogen? a. APEs b. Formaldehyde c. Pesticide d. Styrene 24. What active ingredient kills microorganisms? a. Anti-microbial Agent c. Enzymes b. Bulking Agent d. Preservatives 25. Which among the choices is true about the bulking agent? a. It gives color to the product. b. It enhances the flavor of the product. c. It adds volume to the product without altering the quality. d. It prevents bacteria and viruses from sticking to your clothes. 26. How does the optical brighter make white garments a whiter appearance? a. By enhancing the odor of the garment. b. By reflecting white lights from the sun. c. By absorbing ultraviolet rays in sunlight and transmitting them as blue light. d. None of the above, it’s bleach that makes the garment whiter. 27. How did the Greeks especially Aristotle use the lunar eclipse phenomenon to explain that the Earth is not flat? a. He noticed that the shadow cast by Earth on the moon is round. b. He argued that since the moon's shape seems round, the Earth must also be round. c. He argued that lunar eclipse only happens when a round opaque object blocks the passage of sunlight.  d. He noticed that all things seemed to be moving around the Earth except for Earth itself. 28. Which of the following is true about the how the Greeks knew that the Earth is not flat? a. They observed that Earth is rotating on its axis. b. They noticed that even in short travels northwards the Pole star is higher in the sky. c. They have seen Earth from the outer space d. They observed that during solar eclipse, Earth is temporarily covered with darkness during daytime. 29. Which time of the year did Eratosthenes observe the pillar in Alexandria cast a shadow? a. noon time during spring c. noon time during solar eclipse b. noon time during summer solstice d. noon time during winter solstice 30. How did the ancient astronomers discover that Mercury and Venus are planets not stars? a. They noticed that the stars are in a fixed position with respect to each other. But they have observed that there are very bright stars wherein their positions periodically change. b. They noticed that Mercury and Venus are bigger compared to the other stars. c. They noticed that the constellations’ positions in the night sky vary depending on the time of the year. d. They noticed that the stars change positions periodically. But there are very bright stars in a fixed position with respect to each other. 31. Which concept is Tycho Brahe’s major contribution to astronomy? a. the Earth’s pull of gravity on the moon b. measurement of Earth’ circumference c. accurate measurement of stars and planets’ position d. the invention of telescope 32. Kepler discovered that planets do not go around the Sun at a uniform speed, but it depends on its position relative to the Sun. What is its speed when it is closer to the Sun? a. faster c. slower b. neither fast nor slow d. like the speed when it is far from the sun 33. What relationship did Kepler discover between the times of revolutions of the planets and their distance from the Sun? a. The square of the times of revolution of the planets are proportional to the cube of their average distance from the Sun. b. The square of the times of revolution of the planets are not proportional to the cube of their average distance from the Sun. c. The cube of the times of revolution of the planets are proportional to the square of their average distance from the Sun. d. The cube of the times of revolution of the planets are not proportional to the square of their average distance from the Sun. 34. Suppose you are standing in the aisle of a moving bus. If the driver suddenly makes a left turn, why are you likely to lurch to the right? Because of a. an equilibrium challenge c. your momentum b. an unbalanced force d. your tendency to keep moving forward 35. A ball rolling along a horizontal surface maintains a constant speed. Why is it so? a. friction is present c. no horizontal force acts on it b. no inertia on the object d. surface is smooth 36. Which of the following best describes the refraction phenomenon? a. It is explained better using the wave model of light than the particle model of light. b. It is explained using the photon theory of light. c. The particle model predicts that particles of light will speed up as they pass through the boundary between air and water. d. The wave model correctly predicts that light will slow down as it passes through the boundary between air and water 37. How do we see a tree? a. The light that reaches our eyes has been reflected by the tree. b. The light that reaches our eyes has been refracted by the tree c. The light that reaches our eyes has been separated into a spectrum by the tree. d. The light that reaches our eyes has undergone interference in passing through the tree 38. E=hf is an equation that describes the relationship between the energy (E) and frequency of light (f). Why do we easily get sunburned in ultraviolet light but not in visible light? a. Ultraviolet light is of higher frequency than visible light; therefore, it has higher energy and is sufficiently energetic to cause skin damage,  b. Ultraviolet light has longer wavelengths than visible light; therefore, it has lower energy and is sufficiently energetic to cause skin damage c. Ultraviolet light has shorter wavelengths than visible light; therefore, it has higher energy and is sufficiently energetic to cause skin damage d. Ultraviolet light is of lower frequency than visible light; therefore, it has lower energy and is sufficiently energetic to cause skin damage 39. He formulated the hypothesis that electrons being a particle have wave-like characteristics. a. Albert Einstein c. Max Plank b. Louis de Broglie d. Neils Bohr 40. Which property of light is responsible for the silver lining at the edges of the clouds? a. Dispersion c. Scattering b. Interference d. Diffraction 41. It is a natural occurrence produced by the refraction of light as it travels between hot and cold air. a. mirage c. myriad b. virtual image d. real image 42. Which of the following situations exemplifies the dispersion property of light? a. The image of the flower in a mirror b. The sparkling glow of the diamond ring c. The swaying movement of coin under water d. The rainbow in the sky after the rain shower 43. Einstein theory of special relativity is based on what two postulates? Choose all that apply. I. The laws of physics are the same in all inertial frames of reference moving with constant velocity relative to one another. II. The laws of physics application change based on the condition of the observer. III. The speed of light is constant in all inertial frames of reference. IV. The speed of light depends on the speed of the observer. a. I only c. I and II b. II and IV d. I and III 44. Which of the following describes the speed of light according to Newtonian mechanics? a. The light speed depends on the speed of the observer. b. The speed of light is constant. c. The speed of light depends on its source. d. The speed of light is infinite 45. Which of the following correctly describes the statement: The speed of light is constant? a. The statement is sometimes true. c. The statement is always true b. The statement is never true. d. The statement is sometimes false. 46. Woman on the ground sees a rocket moving past her at 99% the speed of light. Compared to when the rocket is at rest, the women measure the length as being: a. longer c. shorter b. the same length d. all the above 47. Starship "Alpha" travels at 0.9c past an identical starship "Beta," which is at rest. Both a cabin boy on the "Alpha" and a cook on the "Beta" measure the time required for the other ship to pass by their respective windows. Who measures the longer time? a. Both measure the same time. b. The cabin boy c. The cook d. The measured times cannot be compared 48. Which of the following phenomena are consequences of the General Theory of Relativity? a. Black hole c. The existence of gravitational lenses b. Precession of Mercury ‘s orbit d. Weightlessness 49. Why is black hole black? a. All colors are absorbed in that hole. b. All colors are reflected from the hole c. No light can leave this hole d. No light is absorbed by the hole 50. Who discovered that Cepheid variable stars could be used to accurately measure distances? a. Alan Guth c. Edwin Hubble b. Albert Einstein d. Henrietta Leavitt