| A | B |
|---|
| Thermal energy | the sum of the kinetic and potential energy of the molecules of the substance. |
| Specific Heat | amount of heat to raise one kilogram of a substance one degree celsius. |
| conduction | transfers of heat by particles colliding with each other. |
| Conductor | a substance that conducts heat |
| thermometer | an instrument used to measure temperature |
| Two-stroke | the type of heat engine in a lawnmower. |
| radiation | transfers of energy by electromagnetic waves |
| temperature | the average kinetic energy of the particles of a substance |
| convection | transfers of heat by the movement of a gas or a liquid |
| heat | thermal energy transferred because of a difference in temperature |
| thermal pollution | when a body of water warms from adding water or the release of heat into the atmosphere |
| celsius scale | temperature scale with 100 celsius between the freezing and boiling points of water |
| heat engine | a devise that convert thermal energy into mechanical energy |
| Fahrenheit scale | temperature scale with 180 degrees between the freezing and boiling points of water (32degrees Freezing) and (212 degrees Boiling) |
| Insulator | a material through which heat does not easily flow. |
| Internal combustion engine | an engine that burns fuel in a chamber inside the engine |
| Why are the basements of the house often cooler than the rest of the house in warm weather? | Basements are insulated by the ground so they do not heat up when its warm outside also cool air is denser than warm air, so the coolest air will be the lowest part of the house. |
| How are the Kelvin and Celsius scale similar? | Both measure the temperature of an object. However, the Kelvin scale is 273 degrees larger than the Celsius scale. |
| How are thermal energy and heat different | Heat is the amount of thermal energy transferred from one object to another. While heat is the different in that energy from one object to another. |
| Difference between a Heat pump and air conditioner | The both cool room. However, an air conditioner use a coolant to cool a room. And a Heat pump removes warm air from inside and replaces it with cooled water vapor to cool the room |
| Difference between gasoline and diesel | They both internal combustion engines. In gasoline engines, the gasoline is ignited by spark plugs. In a diesel engine, is ignited by compression. |
| Food stores usually stores frozen foods in the freezer open at the top. Why does the warm air not melt the food? | cool air is more dense than warm air, so the frigid air from the freezer forms a layer on the top of the food insulating the food from the warm air above. |
| At a given temperature all of the molecules are moving at the same speed. Is this a true statement or not Explain. | No, there is wide distribution of speed temperature is only based on the average speed. However, as the temperature increases the average speed of the molecules decreases |
| Would it be possible for the thermal energy in a bowl of cold water to equal the thermal energy in a bowl of hot water? | It would be possible if the bowl of cold water was larger than the bowl of hot water. |
| How do we know that heat is transferred by sun to the earth is done by radiation? | There is virtually no matter in space for heat transfer through conduction or convection so we know that heat from the sun must reach earth through radiation. |
| Why does a fluffy bathroom rug feel warmer to your feet than a tile floor even though they are at the same temperature. | The tiles are a better conductor than the rug, so they conduct heat away from your feet than the rug. Therefore, your feet feel colder when they contact the tile. |
| Would opening the refrigerator door on a hot day help keep the kitchen cool? Explain | No, cool air would flow into the kitchen but this would cause the refrigerator motor to run more . |
| What is force convection? | occurs when an outside force pushes air to make it move and transfer heat. The hot air raises and the cool dense air replaces the warm air causing a current. |
| Heat is _________ | thermal energy transferred b/w two objects |
| Temperature is a the measure of____________________ of atoms and molecules | average kinetic enrgy |
| Thermometers work because the _____________ inside them ____________ when heated | liquid, expand |
| A pot on a stove gets hot by means of _________ | conduction |
| Water has a higher specific heat than clay. Water would _____________________ than clay | heat more slowly |
