Temperature and the Kinetic Theory of Matter Write on right side

Kinetic theory of matter Remember: All matter is made up of atoms Kinetic theory of matter states that all of these particles are ALWAYS in motion These particles in motion have Kinetic energy The faster the particles move, the more kinetic energy they have

Solids The particles in a solid are not free to move around much. They vibrate back and forth in the same position Are held together tightly by forces of attractions

Liquids Move more freely than the particles in solids Constantly sliding around and tumbling past each other as they move

Gases Particles are far apart and move around at high speeds Particles can collide with one another

Temperature A measure of the average kinetic energy of all the particles in an object Remember: In colder objects, the particles move slower and in hot objects they move faster

Think about it!!! If an iron is hot, the particles in the solid are vibrating very fast and have high kinetic energy

Measuring temperature Three temperature scales that measure the average kinetic energy: Celsius Fahrenheit Kelvin In Celsius and Fahrenheit, the unit of measurement is Degrees (°) Ex: 100°F, 32°C The unit for Kelvin is just called kelvin (K), Ex: 10K

Measuring temperature We use tools called thermometers to measure temperature

Comparing Temp. Scales 30 degrees means something different for each of these temperature scales Turn to page 339 in textbook

Use the picture to answer the following questions on a separate sheet of paper: Answer the questions for each temperature scale: At what temperature does water boil? What is room temperature? What temperature does water freeze?