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Science Unit 2 JJ
| Question | Answer |
|---|---|
| List the definitions of melting, condensation, evaporation, freezing. | Solid to liquid melting add energy they get fast Liquid to gas evaporating at the surface they gain energy and spread Gas to liquid condensation lose energy they move together |
| Know the characteristics of each state of matter (include particles, kinetic energy, and shape/volume) | Solid vibrates in place fixed volume and shape low kinetic energy. Liquid moves past and around each other fixed volume not shape medium kinetic energy.Gas particles change location relative to each other with no fixed volume or ratio high kinetic energy. |
| What is volume? | How much space a matter occupies |
| Why do solids, that are the same substance as the liquid, sink in the liquid except for water and a few others? | Particles are farther apart in water and closer together in most of the other ones |
| Why is atmospheric pressure greater at lower altitudes/elevations and lower at higher altitudes/elevations? | Due to gravity and the weight of the air higher less air pressure and more particles lower more air pressure and more particles |
| How is it that an increase in pressure can cause a gas to turn into a liquid even though the temperature (kinetic energy) remains constant? | High pressure forces gas particles to touch and stick together and turn into liquid |
| What is kinetic energy and how is it different from temperature? | Kinetic energy is the energy of motion. Temperature is the average energy of all the moving particles. |
| Something to think about; as a substance changes from a solid to a liquid to a gas and vice versa, do the number of particles increase or decrease or stay the same and why? | The number of particles stay the same because we can't destroy or create them. |
| If you worked for the National Weather Service and issued a fog advisory to the public, what would the environmental conditions most likely be outside? | Wet air and high humidity cold ground chilled air temperature |
| Understand the transfer of energy (the lava question and every other discussion in class this past week). | Heat always moves from hot to cold and lava loses heat to the cold air water and the ground high concentration to a low concentration |
| Explain boiling | Liquid into water vapor is boiling particles gain energy and speed up throughout |
Created by:
Moen J