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Wednesday, 9/4 Day 1

Science Starters Sheet. Agenda. Science notebook. 1. Please have these Items on your desk. Pen/ Pencil. Wednesday, 9/4 Day 1. 2- Fill out your Agenda. Science starter:. https://www.youtube.com/watch?v=KCL8zqjXbME&t=4s. What is the definition of energy?

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Wednesday, 9/4 Day 1

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  1. ScienceStarters Sheet Agenda Sciencenotebook 1. Please have these Items on your desk. Pen/ Pencil Wednesday, 9/4 Day 1 2- Fill out your Agenda. Science starter: https://www.youtube.com/watch?v=KCL8zqjXbME&t=4s What is the definition of energy? What is the definition of Kinetic energy? What determines the state that matter is in?

  2. State Change Pyramid Gas Absorbing thermal energy Releasing thermal energy Vaporization Melting Freezing Liquid Solid

  3. Vaporization • The change from a liquid to a gas is known as vaporization. • The temperature of the substance does not change during vaporization. • However, the substance absorbs thermal energy.

  4. Vaporization • Two forms of vaporization exist. • Vaporization that takes place below the surface of a liquid is called boiling. • The temperature at which a liquid boils is called the boiling point. • Vaporization that takes place at the surface of a liquid is called evaporation.

  5. Evaporation • Evaporation, which occurs at temperatures below the boiling point, explains how puddles dry up. • It takes more than speed for water molecules to escape the liquid state. • During evaporation, these faster molecules also must be near the surface, heading in the right direction, and they must avoid hitting other water molecules as they leave.

  6. State Change Pyramid Gas Releasing thermal energy Absorbing thermal energy Condensation Vaporization Melting Freezing Liquid Solid

  7. Condensation • As a gas cools, its particles slow down. • When particles move slowly enough for their attractions to bring them together, droplets of liquid form. • This process, which is the opposite of vaporization, is called condensation.

  8. State Change Pyramid Gas Releasing thermal energy Absorbing thermal energy Condensation Sublimation Vaporization Melting Freezing Liquid Solid

  9. Sublimation • Some substances can change from the solid state to the gas state without ever becoming a liquid. • During this process, known as sublimation, the surface particles of the solid gain enough energy to become a gas. Picture from http://www.ehow.com/how_2098268_fogsmoke-dry-ice-halloween.html

  10. State Change Pyramid Gas Releasing thermal energy Absorbing thermal energy Condensation Sublimation Deposition Vaporization Melting Freezing Liquid Solid

  11. Deposition • Deposition is the phase transition in which gas transforms into solid without passing through the liquid phase.  • Example: • Water vapor freezing to a window. • The making of dry ice (CO²) https://examples.yourdictionary.com/examples-of-gas-to-solid.html

  12. In Class Practice: • Phases and Changes Worksheet • Phase change cut & paste • States of matter worksheet

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