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TH 8 GRADE PHYSICAL SCIENCE IN REVIEW Chemistry, Physics and Astronomy CHEMISTRY Take this quiz and look at your score. Reflect. Take the quiz again as may times as you need to in order to feel good about your understanding of these concepts. Remember that your attitude can determine altitude. You CAN do it!!! INVESTIGATION AND EXPERIMENTATION 1. A hypothesis is 2. The observation or measurements made in an experiment are called 3. When making a conclusion, scientists 4. Accurate measurements 5. The reproducibility of data refers to INVESTIGATION AND EXPERIMENTATION CONTINUED 6. The manipulated variable is an experiment is the variable that 7.The slope of a straight line is calculated with the equation 8. One a line graph, the x-axis is the labeled with the name of the 9. A bar graph would be best used to graph 10. If the data points for a graph form a smooth curve, the graph shows a 11. Which kind of graph has a constant slope? STRUCTURE OF MATTER 12. In a liquid, the particles 13. The distance between particles in a gas is 14. What is the chemical symbol for silver? 15. Which elements combine to form the compound represented by the formula KCl? 16. What is the atomic number of copper? MORE ON THE STRUCTURE OF MATTER 17. Which group in the periodic table does the element calcium belong to? 18. What is the atomic number of krypton? 19. The three particles that make up an atom are 20. Which particles in an atom account for nearly all the atom’s mass? 21. A substance made of two or more elements chemically combined in a set ratio is STILL MORE ON THE STRUCTURE OF MATTER 22. An ionic bond is 23. How can an atom best be described? 24. Which particles of an atom move around the nucleus, forming a cloudlike region of negative charge? 25. An atom’s valence electrons are those electrons 26. The atoms in a molecule of water are joined by A FINAL WORD ON THE STRUCTURE OF MATTER 27. Ionic compounds form solids by building up 28. An ionic compound forms a solid with an orderly, three-dimensional pattern called a(an) 29. Name three characteristics of molecular compounds. 30. Which change in state involves a decrease in molecular motion? 31. Which state of matter has definite volume but not shape of its own? REACTIONS 32. New substances produced in a chemical reaction are called 33. The substances that produce a chemical reaction are called 34. Name an evidence that a chemical reaction has occurred. 35. The number of reactant atoms is __________the number of atoms in the product. 36. How many atoms of oxygen are in a molecule of CO2? 37. When new chemical bonds form, WRAPPING UP REACTIONS 38. In an endothermic reaction, ______________. Example? 39. In an exothermic reaction, _____________. Example? 40. Why does an exothermic reaction require activation energy? 41. A change of state is a physical change because 42. Name three changes of state. 43. The parts of a mixture can be separated by 44. Describe how you can identify a base by its pH level. 45. When an acid is mixed with water, THE PERIODIC TABLE 46. Most of the elements in the periodic table are 47. The most reactive nonmetals are located in Group 48. Elements that have some properties of metals but also some properties of nonmetals are classified as 49. The atomic number of sodium is 11. The nucleus of every atom contains this number of 50. The atomic number of hydrogen is 1. The nucleus of the isotope hydrogen-2 contains 51. Two atoms with different atomic numbers are THE PERIODIC TABLE CONTINUED 52. Compared to metals, nonmetals tend to be 53. Metals are good electrical conductors because 54. Thermal conductivity refers to the ability of a substance to conduct 55. Given an example of an unknown metal, the best way to identify the metal would be 56. Why do elements within the same group tend to have similar chemical properties? CHEMISTRY OF LIVING THINGS 57. How many electrons does a carbon atom have available to form chemical bonds? 58. What kind of bonds do carbon atoms form? 59. How can you identify an organic compound? 60. What is a polymer? 61. Give an example of a polymer? 62. Give an example of a monomer that makes up the polymer you chose? 63. What are the building blocks of nucleic acids? CONCLUDING CHEMISTRY IN REVIEW 64. Living organisms can best be described as having ____(#) elements to make up their molecules. Name as many as you can. 65. Which organic molecules does your body use to build and repair body parts and to regulated all cell activities? 66. Give an example of a monomer that makes up the polymer you chose? 67. What are the building blocks of nucleic acids? 68. Living organisms can best be described as having ____(#) elements to make up their molecules. Name as many as you can. 69. Which organic molecules does your body use to build and repair body parts and to regulated all cell activities? PHYSICS Take this quiz and look at your score. Reflect. Take the quiz again as may times as you need to in order to feel good about your understanding of these concepts. Remember that your attitude can determine altitude. You CAN do it!!! FORCES 1. A force is 2. Force is a vector quantity because it has 3. The SI unit used to measure the magnitude of a force is the 4. The combination of all the forces acting on an object is called the 5. Equal forces acting on one object in opposite directions are called FORCES CONTINUED 6. The tendency of an object to resist motion is called 7. Gravity is a force that 8. The two elastic forces are 9. Friction is a force that 10. When a book is sitting on a table, what is the force of the table pushing up on the book called? FINISHING FORCES 11. If the net force on a chair is 6N to the right, what will occur? 12. A centripetal force is 13. What is the effect of lift? 14. The rate at which velocity changes with time is called 15. The rate at which velocity changes with time is called 16. The acceleration of an object depends both on the net force acting on the object and on 17. Acceleration equals ASTRONOMICAL FORCES 18. Astronomers theorize that the universe began with a enormous explosion of matter (force) called 19. The sun was formed when 20. The path of an object as it revolves around another object is space is called a(an) 21. The force that holds the moon in orbit around the Earth is MOTION 22. A standard reference point is a place or object 23. Name an object that would make a good reference point. 24. The position of an object can be defined using a reference point and a set of 25. The speed of an object is the 26. Velocity is speed 27. Velocity is a vector quantity because it has both MORE ON MOTION 28. What equation can be used to determine the speed of a moving object? 29. What equation can be used to determine the average speed of a moving object? 30. What equation is used to solve a problem that involves finding distance, given the time and average speed? A FINAL WORD ON MOTION 31. A change in a speed, direction, or both is a change in a moving object’s 32. What is the SI unit of acceleration? 33. On a position-versus-time graph, where is time shown? 34. Slope is 35. To determine the slope of a line, DENSITY AND BUOYANCY 36. The density of a substance is based on the substance’s 37. Which unit is used to express the density of a substance? 38. When a sample of liquid is divided in half, its density 39. What is density used to determine? 40. How is the mass of a rectangular solid measured? 41. How is the mass of an irregular solid measured? WRAPPING UP DENSITY AND BUOYANCY 42. A beach ball pops out of water because the buoyant force is 43. Why does a ship float, when a solid block of steel of equal weight sinks? 44. Why does an air-filled balloon fall to the ground? 45. Whether an object will sink or float in a fluid can be predicted by knowing ASTRONOMY Take this quiz and look at your score. Reflect. Take the quiz again as may times as you need to in order to feel good about your understanding of these concepts. Remember that your attitude can determine altitude. You CAN do it!!! EARTH IN THE SOLAR SYSTEM: GALAXIES 1. A huge group of stars, dust and gas bound together by gravity is a 2. Most elliptical galaxies have only 3. Where is our sun located in the Milky Way? EARTH IN THE SOLAR SYSTEM: STARS 4. The sun produces energy through 5. When you look at the sun you are seeing the 6. On the surface of the sun, what often link different parts of sunspot regions? 7. Every star begins its life as a 8. A star is born when a protostar becomes so dense and hot that 9. What produces the energy that caused stars to shine? 10.You can see the moon at night because 11. A solar eclipse can occur EARTH IN THE SOLAR SYSTEM: MEASUREMENT 12. An astronomical unit is 13. A light-year is 14. The Milky Way is about 100,000 light- years wide. To cross the Milky Way, light takes about EARTH IN THE SOLAR SYSTEM: PLANETS AND NATURAL SATELLITES 15. A natural satellite that revolves around a planet is called a(an) 16. The four inner planets all have 17. Which planet has polar ice caps containing frozen water and carbon dioxide? 18. Which is the largest planet in the solar system? 19. What is the composition of the four planets closest the sun? 20. An object that’s composed mainly of ice and is orbiting the sun in an elliptical path is most likely
