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SCIENCE - WRITTEN WORK 2 Multiple Choice: Read each question carefutly and choose the letter of the best answer. Write your answer in your answer sheet. 1. What happens when chocolate melts? A. The particles of chocolate lose their orderly arrangement to form gas. B. The particles of chocolate lose their ordeny arrangement to form liquid. C. The particies of chocolate keep their orderly arrangement to form liquid. D. None of these. 2. What happens when a chocolate drink freezes? A. It absorbs heat. and the particles lose kinetic energy. B. It releases heat, and the particles lose kinetic energy. C. It absorbs heat. and the particles lose potential energy. D. It releases heat. and the particles lose potential energy. 3. What happens when alcohol evaporates? A. It absorbs energy causing particles to vibrate faster. B. It absorbs energy causing particles to vibrate slower. C. It releases energy causing particles to vibrate faster. D. It releases energy causing particles to vibrate slower. 4. Which is TRUE about deposition? A. It is responsible in cloud formation B. It is responsible in snow formation C. It is the exact apposite of evaporation D. It occurs substance changes directly from solid to gas 5. Which is NOT TRUE about evaporation? A. It occurs when matter absorbs energy B. It occurs when gaseous substance turns to liquid 0. It occurs when a substance turns from liquid to gas D. It occurs when the kinetic energy of the particles increases WEEK 1 MODULE 1: The Properties of Matter MATTER 0 Anything that has mass and volume. . According to Kinetic Molecular Theory it states that all matter is made up of tiny particles that are constantly moving. All particles have energy, but the energy varies depending on the temperature the sample of matter is in. There is empty space in between the particles. The particles are in constant motion. When energy is added, the particles move faster and further apart and matter expands (state changes from solid to liquid to gas) while when energy is removed the particles move slower and closer together and matter contracts (state changes from gas to liquid to solid). According to Kinetic Molecular Theory states that matter is made up There are forces that act between the particles. Properties of Solid Denite shape. Solid particles are close to each other in orderly arrangement and occupy definite positions, which give and maintain the shape of the solid. Denite volume. Solid particles have strong attraction between each other. Its volume is maintained even when transferred to another container. Low compressibilinx. Because of the closeness of the particles to each other, and the lack of enough space for the particles to move in. High density. Solid particles are close to each other and completely occupy a given space. Does not flow easily. Solid particles are closely packed together and are found in fixed positions. These particles only vibrate in place and they cannot slide past one another. Properties of Liquid No definite shape. Liquid particles are close together, but they are not orderly arranged. These particles are in constant motion, and thus they slide past one another but stay together. Denite volume. Liquid particles have strong attraction between each other, which allow its volume to be maintained even when transferred to another container. Low compressibility. Because of the closeness of the particles to each other, there is only a little free space for the particles to move in. Lower density. This is because of the absence of an orderly arrangement between particles even if they are close together. Flow easily. Liquid particles are not orderly arranged nor found in fixed positions, and thus can slide past one another easily. Properties of Gas No definite shape. Gas particles are in constant motion and are far apart from each other. Since its particles can move to any space available, a gas sample will take the shape of the container. No denite volume. The large spaces in between the particles allows gases to free to move to completely occupy a given space. This is the reason why gas occupies the total volume of Th. 5mm of Mt..- the container. High compressibilinz. The presence of large spaces between 0 0 gas particles allow these particles to be easily pushed to come | l closer to each other. 0 Very low density. The weak interaction between gas particles 5mm unum GAS results in large spaces in between. Thus, only a few particles are available in a given space. Flow easily. The presence of large spaces in between particles allow particles to easily slide past one another. Further cooling of the liquid causes freezing or solidication. This process allows the particles to get closer and have rigid position. The particles can no longer move freely instead, they will just vibrate. The temperature wherein a liquid solidifies is called freezing point. .3310 * +++ ++.->