Temperature and Particle Movement EQ: How do I know kinetic energy is the basis of temperature?

Matter and moving particles All matter is made of atoms Atoms are always in motion Motion of atoms give off energy EQ: How do I know kinetic energy is the basis of temperature?

Kinetic Theory of Matter All the particles that make up matter are constantly in motion Explains the different states of matter EQ: How do I know kinetic energy is the basis of temperature?

Kinetic Theory of Matter Solid –Particles are not free to move around very much –Vibrate back in forth in the same position –Held tightly together by forces of attraction EQ: How do I know kinetic energy is the basis of temperature?

Kinetic Theory of Matter Liquid Particles –Move more freely than solids –Constantly sliding around and tumbling over each other as they move EQ: How do I know kinetic energy is the basis of temperature?

Kinetic Theory of Matter Gas Particles –Are far apart –Move at high speeds –Might collide with one another, but otherwise they do not interact EQ: How do I know kinetic energy is the basis of temperature?

Particle Speed Do not always move at the same speed even in the same object A fast moving particle may strike another particle and lose speed A slow moving particle may strike a faster one and pick up speed EQ: How do I know kinetic energy is the basis of temperature?

Temperature A measure of the average kinetic energy of all the particles in an object, not just speed If a liquid has a high temperature, the particles are….. Moving faster This means the kinetic energy is high EQ: How do I know kinetic energy is the basis of temperature?

Temperature Scales Degrees –Used to measure temperatures –Equally spaced units between two points To establish a temperature we usually use the freezing and melting points of water EQ: How do I know kinetic energy is the basis of temperature?

Celsius SI Unit for measuring temperature Freezing is 0 Boiling is 100 EQ: How do I know kinetic energy is the basis of temperature?

Why does a thermometer’s fluid go up? Measures temperature through the regular variation of some physical property of the material inside the thermometer Measures temperatures because the liquid inside the thermometer always expands or contracts by a certain amount in response to a change in temperature EQ: How do I know kinetic energy is the basis of temperature?

Thermal Expansion Property that makes liquid filled thermometers work All gases, many liquids and most solids expand when their temperature increases EQ: How do I know kinetic energy is the basis of temperature?

Expansion Joints Used to build highways and bridges Short segments with slight breaks in highways and bridges Allows the material to expand easily EQ: How do I know kinetic energy is the basis of temperature?

Class Work and Homework Fill In –What did I learn –Confused –Say –Read pages 37 – 42 –Answer questions 1-6 –Questions 1 – 3, plus the challenge question on page 43 EQ: How do I know kinetic energy is the basis of temperature?