io io.4o sci 6o zo iu* rro toi B a *c -20 A. lf a hypothesis proves to be wrong, then nothing in the experiment is valid or

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1 Name Date Period 1st Semester Study Guide Science 8 When a student is finished working with chemicals what should the student do before leaving the laboralory? Eating in the laboratory Why should all classroom aisles and walkways be kept clear? It is important to follow safety procedures in the laboratory in order to What are you doing when you use your five senses to gather information? What should students do before inserting the plug of an electrical device into a socket? When should students enter the science storage room? What is the boiling point of water on the Celsius scale? Which part of your ear do sound waves enter through? Where should a student discard chemicals after an investigation? Which tool would be used to measure the mass of a rock? Which tool would be used to measure the length of a science book? Which tool would be used to measure the volume of water? *c -20 -='10 TT,MI}ERATUR.! io io.4o sci 6o zo iu* rro I r* r J toi B a tyoter/ree:es badytemoercture rr{t 140 ldo 180 2oolz2o wstef bails Which statement correctly reflects the information in the diagram? A. 60oF is warmer than 20oC B. The weather is warmer in the United States than other countries. C. The Celsius scale is hard to understand. D. Water freezes at a lower temperature on the Celsius scale. Which one of the statements about a hypothesis is true? A. lf a hypothesis proves to be wrong, then nothing in the experiment is valid or valuable. B. lf a hypothesis proves to be wrong, the experiment can still be valid because you can learn from the data. C. A hypothesis should not be made if the investigation is of a serious nature. D. A hypothesis is useful when you are positive of what the results of an experiment wilt be. I

2 16. What color of light will pass this filter? ln this diagram, what happens to the wavelength of a wave when the frequency increases? ln this diagram, the wavelength is shown with ln this diagram, the amplitude is shown with 20. This diagram represents l,or, \ Li '\ 21. This diagram represents \ lxl I i\t 22. \b^ When is off task behavior appropriate during an investigation? Which part of your ear sends the message to your brain that you've heard a sound? What can cause hearing loss? The most common type of hearing loss is due to Before beginning an investigation, students with long hair should A disturbance that transfers energy from place to place is called a What is the best method of eye protection when using heat, chemicals and glassware in an investigation? The material through which a wave travels is called a Waves are created when a source of energy causes a medium to What is the highest part of a transverse wave called? What type of wave moves particles in the medium parallel to the wave motion? Taking materials from the science laboratory is

3 34. The distance between two corresponding parts of a wave is called 35. What is the interaction between two waves that meet called? 36. Visible light has a higher frequency than 97. What should a student do first if a chemical spills in the laboratory? 38. Clear glass, water, and air are examples of what kind of material? 39. Frosted glass and wax paper are 40. When the surface of a mirror curves inward, like the inside of a bowl, it is called a 41. What happens when light passes from air into water? 42. A curved piece of glass or other transparent material that is used to refract light is called a(n) 43. What happens when white light strikes a black object? 44. You can hear sounds from around corners because of 45. lf a student is allergic to a substance used in an activity what should the student do? 4O. The range of electromagnetic waves placed in a certain order is call the 47. The electromagnetic waves with the highest frequencies are called 48. The primary colors of light are 49. Visible light can be separated into the various colors of the visible spectrum to form a(n) 50. A train that travels 100 kilometers in 4 hours is traveling at what average speed? 51. When solving the problem of a flat tire on a bicycle, which of the following would be an example of a hypothesis? A. Inflate the tire to pressure of 16 kg/cm2 B. The air leak is due to a faulty valve stem on the tube C. There was no hole found in the tire D. I think the tire went flat because of a nail puncture 52. What is the speed of an object traveling 200 kilometers in 2 hours? 53. How far away from its starting point would a truck be in 3 hours if its average speed was 100 kmnrr? 54. What should a student do if equipment is not working properly during an investigation?

4 55. ln an acceleration graph showing speed versus time, a straight line shows the acceleration is 56. When visible light is separated into the various colors of the visible spectrum what is formed? 57. ln which of the following areas is a speed limit least important? A. A school zone C. A race track B. A neighborhood street D. An interstate highway 58. Researchers often repeat their experiments five, ten, or more times. Why do they do this? 59. What would decrease the stopping distance of a car? 60. Think about an object in motion. What determines how far it will travel? 61. The pitch of a sound that you hear depends on the sound wave's 62. What are some examples of kinetic energy? 63. What are some examples of potential energy? 64. Visible light is an example of which form of energy? 65. lf a student's hand is cut during an investigation what should the student do immediately? 66. ln physical science, what is a push or a pull called? 67. What happens when two forces act in the same direction? 68. The tendency of an object to resist any change in its motion is known as 69. The greater the mass of an object, 70. Force equals mass times 71. What is the force that one surface exerts on another when the two rub against each other? 72. What is the force that pulls falling objects toward Earth? 7g. The force of gravity on a person or object at the surface of a planet is known as 74. Which law can explain how gases released from burning fuel in a rocket produce thrust? 75. Any force that causes an object to move in a circle is called a(n) 76. when an object's distance from another object is changing

5 A p]ace or object used for comparison to determine if something is in motion is called lf you know the distance an object has traveled in a certain amount of time, you can determine Speed equals distance divided by lf an object mgves in the same direction and at a constant speed for 4 hours, which of the following is true? A. The object's speed changed during the 4 hours E. fhe object's vblocity did iot change C. The object accelerated during the 4 hours D. The object decelerated durin! the 4 hours When you know both the speed and the direction of an object's motion, you know the You can show the motion of an object on a line graph in which you plot distance against The rate at which velocity changes is called Changing direction is an example of What happens when parallel rays of light hit a smooth surface? The bending of light rays as they enter a new medium is called The bending of waves due to a change in speed is called A curved piece of glass or other transparent material that is used to refract light is called What happens when light passes from air into water What happens to the wavelength of a wave when the frequency increases? True or false: All of the electromagnetic radiation spectrum is visible to humans. The maximum distance that the particles of a medium move from the rest position is the Which of these has the longest wavelength? A. Blue light C. Radio wave B. lnfrared radiation D. X-ray Which of these has the highest frequency? A. Blue light C. Radio wave B. lnfrared radiation D. X-ray

6 95. Which of these has the lowest frequency? A. Blue light C. Radio wave B. lnfrareb radiation D' X-raY 96. All sounds are created by 97. ls it important that scientific investigations be open to evaluation and criticism? 98. A material that reflects or absorbs any light that strikes it is 99. What type of mirror is showni 100. ldentify the focal point where reflected light rays meet and focus.