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Physical Sci Ch 5
9th grade Physical Sci. Unit Test
| Question | Answer |
|---|---|
| A device that converts thermal energy into mechanical energy______. | Heat Engine |
| A device that heats your home by transferring thermal energy from a region of low temperature to high temperature is a_______. | Heat Mover |
| Refrigerators and air conditioners are examples of_______. | Heat Movers |
| Wind and ocean currents are formed by_____. | Convection |
| A material that reduces the flow of heat by conduction, convection, and radiation is an________. | Insulator |
| All of the following are good conductors of heat except for_____. | Air |
| Of the following the insulation that is most resistant to heat flow is rated______. | R40 or the highest R value |
| The process by which engine fuels burn is_____. | Combustion |
| Through which of the following will convection most likely occur. | Liquids and Gasses |
| Gasoline and diesel are____. | Internal Combustion Engine |
| The transfer of energy that does not require matter_____. | Radiation |
| Solar collectors are parts of_____. | Active Solar Heating Systems |
| Energy from the sun travels to Earth as____. | Radiant Energy |
| The specific heat of an object depends on its_____. | Chemical Makeup |
| Two equal masses of two different kinds of matter____. | Probably have different thermal energy |
| Temperature measures the_____of the particles of a material. | Kinetic Energy |
| The effectiveness of insulation is rated with a_____. | R Value |
| The inside surfaces of the glass inside vacuum bottles are coated with aluminum to prevent heat loss by____. | Radiation |
| Compared to the efficiency of a gasoline engine and diesel engine is____. | Twice as efficient |
| Compare and contrast heat and temperature. | Temperature is a measure of how fast the particles are moving or the kinetic energy. Heat is the kinetic and potential energy of an object. |
| What is specific heat? | A measure of how much energy it takes to increase the kinetic energy of a material particle. |
| How does thermal energy relate to A. Heat B. Temperature | Heat is thermal energy that flows from a higher temp to a lower temp. Temperature is a measure of the moving part of thermal energy. |
| What is the equation for measuring the change in thermal energy. | Q=M x ^T x C (Q=change in thermal energy) (M=mass) (^T= change in temp) (C= specific heat) |
| Gas| Diesel | Stem (Chart) | (burns fuel)(internal) | (Burns fuel)(internal) | (burns fuel)(external) |
| What gives uniform warmth. | Electrical |
| Large tank for storing water heat by the sun. | Active Solar |
| Fans move warm air. | Forced Air |
| Pump circulates a liquid to a radiator. | Hot Water |
| Large windows on the south side of the building. | Passive Solar |
| Hot vapor is forced through radiators | Steam |
| How would the heat from the pot move to the handle? (Chart) | Conduction |
| Where does the heat go in the room with the fireplace. (Chart) | Outside through the chimney |
| Thermal energy is transferred to the people by. (Chart) | Convection and Radiation |
| The thermal energy transferred from the iron to the clothes by. (Chart) | Conduction |
| Water has a very high specific heat. Why does it make it a very good substance for use in cooling systems in automobiles? | Because it can absorbs lot of heat |
| A well insulated house should have insulation with an R-value with at least R-19 in the wall and an R-value of R-32 and R-44. Why would there be higher R-value in the ceilings? | Because heat rises |
| Why do the pipes in a steam heating system need to be insulated? | To keep the heat in |
| To the sun-room. (Chart) | Convection and Radiation |
Created by:
P.V.A.
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