Science 7 1st Quarter Exam PDF

It is anything that occupies space and has mass. A. **Atom B. Cell C. Matter D. Plasma** 2. Is coined to be the basic unit of matter. A. **Cell B. Atom C. Matter D. Plasma** 3. Which of the following shows GAS property of Matter? A. B. C. D. F...

It is anything that occupies space and has mass. A. **Atom B. Cell C. Matter D. Plasma** 2. Is coined to be the basic unit of matter. A. **Cell B. Atom C. Matter D. Plasma** 3. Which of the following shows GAS property of Matter? A. B. C. D. For Items 4-7 A.  B. C. D. 4. **Physical Models** 5. **Simulation Models** 6. **Conceptual Models** 7. **Mathematical Models** 8. **Why do scientists use models?** A. **They are exact representations of reality.** B. **They only exist in computer simulations.** C. **They are always simple and easy to understand.** D. **They can be used to test ideas and make predictions.** 9. Sal is studying the solar system. He makes a physical model using different-sized foam balls to represent the planets. Which best describes why a physical model is a useful tool for studying the solar system? A. Solar systems is too big/large to study directly B. A model of solar system eliminates the need of scientist to go to outer space C. A model of solar system provides the exact replica of actual solar system D. A model of solar system can provide more data to study. For Items 10-13  Identify the proponents of the given atomic models below. A.  B. C. D. 10. Ernest Rutherford 12. Erwin Schrodinger 11. Joseph John Thomson 14. Erwin Schrodinger 15. Pure substance that cannot be separated into simpler substances by physical or chemical means and it consists of only one kind of atom. A. Compound B. Element C. Mixture D. Pure substance 16. Which of the following is the chemical symbol for Carbon? A. C B. Cl C. Cr D. Cu 17. What are the components of table salt (NaCl)? A. Sodium and Carbon C. Sodium and Chlorine Sodium and Copper D. Sodium and Chromium 18. Which of the following is NOT an element? A. Calcium B. Iron C. Manganese D. Sugar 19. Which of the following are compounds? A. Salt and Sugar C. Silicon and Sulfur B. B. Copper and Zinc D. Bromine and Lithium 20. Why is it important to be familiarized with elements and compounds? A. To classify them accordingly. B. To impress others by knowing them. C. To identify elements and compounds. D. To tell your classmates you know them. 21. Which of the following is correctly matched? A. Lithium: Element C. Aluminum: Compound B. Hydrogen: Compound D. Cabon monoxide: Element For item 22, refer to the illustrations below. I II III IV 22. Which illustration/s best describe/s an element? A. I only B. I and IV C. II and IV D. II and III 23. Water is composed of two atoms of hydrogen and one atom of oxygen. Which of the following can be the particle model for water? 24. Solid to liquid A. Freezing 25. Liquid to solid B. Melting 26. Liquid to gas C. Deposition 27. Gas to liquid D. Sublimation 28. Solid to Gas E. Condensation 29. Gas to solid F. Evaporation 30. On a hot day, Timmy spilled some water on the sidewalk, and after a while, he noticed the water had disappeared. What changes in the state of matter happens in this scenario? A. **Evaporation B. Condensation C. Deposition D. Sublimation** 31. Lina placed a small piece of alcamphor in her cabinet, and after a few days, it was gone without melting. Her dad explained that alcamphor undergoes what process?, turning directly from solid to gas, leaving no liquid behind. A. **Sublimation B. Condensation C. Deposition D. Evaporation** 32. After a cold drink on a warm day, Jake noticed water droplets forming on the outside of his glass. His sister explained that the air\'s moisture (GAS) turned into liquid when it touched the cold surface of the glass. What process is this? A. **Condensation B. Freezing C. Deposition D. Evaporation** 33. According to Kinetic Molecular Theory, what happens to the particles in a substance as its temperature increases? A. They move faster. B. They move slower. C. They stop moving. D. Their arrangement doesn\'t change 34. Which of the following are compounds? A. Salt and Sugar C. Copper and Zinc B. Silicon and Sulfur D. Bromine and Lithium 35. Deanna was asked by her teacher to match compound with its constituent elements. Which do you think of the matched pair is correct? I. Salt: Potassium, Chlorine II\. Water: Hydrogen, Oxygen III\. Carbon monoxide; Carbon, Hydrogen IV\. Sugar: Oxygen, Calcium, Magnesium A. I only B. II only C. II and III D. III and I 36. It is a good conductor of electricity. A. Metals B. Non-metals C. Metalloids D. Plasma 37. Dull , poor conductor of heat and electricity , brittle and unmalleable. A. Metals B. Non-metals C. Metalloids D. Plasma 38. It has a property of both metals and non-metals. A. Metals B. Non-metals C. Metalloids D. Plasma 39. It is an acid found in the stomach. It primarily aids digestion. B. Acetic acid B. Methane C. Hydrochloric acid D. Water 40. Metal: Iron as A. Metalloid: Boron C. Metalloid: Fluorine B. Non-metal: Beryllium D. Non-metal: Manganese 41. Elements can be classified as metals, non-metals and metalloids. Which of the following best describes the differences among the three classifications? I. Metals are poor heat conductors, non-metals are malleable and metalloids are brittle. II. Most of the metals are good conductors, non-metals are poor heat conductors and metalloids are mostly malleable. III. Most of the metals are solid at room temperature, non-metals are good heat conductors and metalloids are mostly brittle. IV. Metals are good heat conductors, non-metals are not malleable and metalloids display properties that are intermediate between those of metals and non-metals. A. II only B. IV only C. I and II D. III and IV 42. It is a series of logical steps that is followed in order to solve a problem. A. Scientific theory C. Scientific investigation/ method B. Experimental method D. Experimental process 43. Which of the steps in the scientific investigations/ method is in correct sequence? I. Materials and Equipment II. Results III. Data IV. Conclusion V. Aim and Problem VI. Methods and Procedures A. V, I, IV, II, III, VII C. V, I, VI, IV, II, III B. I, II, III, IV, V, VI D. V, I, VI, III, II, IV 44. What is the first step in scientific method? A. Conclusion C. Aim and Problem B. Methods and Procedures D. Data 45. Which step follows after formulating the Aim and Problem ? A. Methods and Procedures C. Results B. Conclusion D. Methods and Procedures 46. What variable can be manipulated during experiment? A. Controlled C. Dependent B. Experimental D. Independent 47. "If plants are exposed to sunlight, then they will grow faster." This is an example of what step in scientific investigation/method? A. Conclusion B. Data B. Methods/Procedure D. Results 48. Dave used what step in scientific method when he listens to the sounds that dogs produced? A. Conclusion C. Data B. Methods/Procedure D. Results 49. Why is experiment important? A. Helps generate jobs for scientists. B. Creates more questions to be answered. C. Provides the foundation for scientific knowledge. D. Ensures that a variety of tools are used accurately. 50. Why is the Scientific investigation/ method such an important part of the experimentation process? A. It takes more work but it is worth it. B. It helps the experiment to take longer and be better. C. It assures that the experiments are carried out by scientists D. It provides objective and systematic way in conducting experiments.