Heat and Changing States of Matter - Discovery Education

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ANSWER KEY for page 18VOCABULARYThe following terms are from Heat and Changing States of Matter. Fill in the number of each termnext to its closest definition.1. boiling point2. calorie3. conduction4. convection5. expansion6. friction7. fusion8. heat9. radiation10. resistance___ 5___310___6______ 8___1___ 7___ 9___ 24___process of kinetic energy that causes molecules to vibrate against each other, increasingheat and frictiontransmission of heat by thermal energy from particle to particlea material’s ability to insulate heatresistance of motion that occurs when one object touches anotheramount of thermal energy that one object is able to transfer to another; measured in caloriestemperature at which a liquid being heated reaches a peak temperature and can get nohotterjoining of the nuclei of two atoms to form the nucleus of a heavier elementprocess whereby energy in the form of light rays or heat is transmitted from atoms andmolecules as they undergo internal changesamount of energy required to raise the temperature of one gram of water one degreeCelsiustransfer of heat that occurs when thermal energy causes currents to form in fluids and gases28© Copyright 1999 AIMS Multimedia Heat and Changing States of Matter
ANSWER KEY for page 19CHECKING COMPREHENSIONRead the following sentences and circle the letter of the word that best fills each blank.Heat causes the ___1___ of matter to change by expansion or contraction of molecules. The amountof ___2___ in a molecule is a reflection of its kinetic energy. ___3___ is a measure of the averagekinetic energy of the molecules making up an object. If we apply ___4___ energy to a material, wecan increase its kinetic energy and cause it to change states. Heat is measured in units called___5___ . Some materials, such as coal, have stored or ___6___ energy. This energy is released asthe coal burns. The heat necessary to change a substance from a solid to a liquid, with no temperatureincrease occurring, is called the heat of ___7___ . The heat necessary to convert boiling waterto steam is called the heat of ___8___ . Most materials ___9___ as they get hotter and ___10___ asthey get cooler.1. A. atomic structureB. stateC. colorD. boiling point2. A. protonsB. massC. motionD. volume3. A. DensityB. Vapor pointC. Fusion levelD. Temperature4. A. thermalB. potentialC. solidD. liquid5. A. hertzB. joulesC. wattsD. newtons6. A. potentialB. thermalC. nuclearD. radiation7. A. vaporizationB. expansionC. contractionD. fusion8. A. convectionB. vaporizationC. conductanceD. thermodynamics9. A. expandB. contractC. insulateD. convect10. A. vaporizeB. conductC. expandD. contract© Copyright 1999 AIMS Multimedia Heat and Changing States of Matter29
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Page 5 and 6: ORGANIZATION ANDMANAGEMENTTo facili
Page 7 and 8: PREPARATION FOR VIEWINGSECTION 3In
Page 9 and 10: VOCABULARYEvery ATM contains an act
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Page 13 and 14: INTRODUCTION TOTHE PROGRAMThe prese
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Page 17 and 18: Critical ThinkingHeat causes many p
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