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8th Ch 6 Questions
Questions from Ch 6 Outlines
| Question | Answer |
|---|---|
| What kind of energy does a "moving" object have? | kinetic |
| What kind of energy is "stored" energy? | potential |
| What kind of energy is the combination of kinetic and potential energy of an object on a large scale, like a soccer ball? | mechanical |
| What is thermal energy the sum of? | kinetic and potential energies of particles |
| What is thermal energy? | the sum of kinetic and potential energy of particles in a material |
| What kind of particle energy is related to temperature? | kinetic |
| Complete the relationship: Materials with higher temperature have ______ average kinetic energy particles than materials with lower temperature. | higher |
| Particles whose kinetic energy is large are moving at an ______ average speed than particles whose kinetic energy is smaller. | greater |
| Two materials can have the same temperature but have different what? | thermal energy |
| What is used to measure temperature. | thermometer |
| What thermometer has a liquid that expands when the temperature rises and contracts when the temperature drops. | bulb |
| What thermometer measures the resistance in an electronic circuit and converts it to a temperature? | electronic |
| What temperature scale is used around the world by scientists. | Celsius |
| What temperature does water freeze on the Celsius scale? | 0 |
| What temperature does water boil on the Celsius scale? | 100 |
| Water freezes at 273 and boils at 373 on what scale? | Kelvin |
| What is the lowest possible temperature any material can get; at this temperature the particles would have no kinetic energy. | Absolute Zero (0 K) |
| What is heat? | The movement of thermal energy from a warmer object to a cooler object. |
| Thermal energy can be _______ from one object to another by radiation,conduction, and convection. | transferred |
| What is radiation? | The transfer of thermal energy from one object to another by electromagnetic waves. |
| When particles ______, the particles have a higher kinetic energy transfer energy to particles that have lower kinetic energy. | collide |
| What is being transferred along with kinetic energy when particles collide? | thermal energy |
| In what kind of materials does radiation happen? | solids, liquids, and gases (ALL objects!) |
| The only way for thermal energy to travel from the Sun to Earth is by ___. | radiation |
| Empty space is referred to as a ___. | vacuum |
| The average kinetic energy of the particles in a substance is also known as ___. | temperature |
| The transfer of thermal energy between materials due to particle collisions is called ___. | conduction |
| Under what condition is there "heating"? | As long as one object has a higher temperature than the other. |
| What is a material in which thermal energy flows easily through? | thermal conductor |
| What is a material in which thermal energy does not flow easily? | thermal insulator |
| ____ are good conductors because they have electrons that move easily. | metals |
| _____ are good insulators because they have electrons that do not move as easy. | non-metals |
| What is the amount of thermal energy it takes to increase the temperature of 1 kg of a material by 1 on the Celsius scale. | specific heat |
| Water has a _____ specific heat which makes it good for cooling. | high |
| An increase in a material's volume because of the temperature rising. | thermal expansion |
| A decrease in a material's volume because of the temperature dropping. | thermal contraction |
| What is the transfer of thermal energy by the movement of particles from one part of a material to another? | convection |
| Convection occurs because of differences in _____ due to thermal expansion and thermal contraction in different parts of the material. | density |
| What are the movements of fluids up and down in a cycle because of convection? | convection currents |
| _____ appliances are devices that convert electrical energy into thermal energy. | heating |
| What is a device that regulates the temperature of a system? | thermostat |
| A ____ is a device that uses electric energy to pump thermal energy from a cooler location to a warmer location. | refrigerator |
| A refrigerator uses electrical energy to move ________ through the refrigerator pipes. | coolant |
| A machine that converts thermal energy into mechanical energy. | heat engine |
| A ________ engine, such as those found in moving vehicles, converts thermal energy into mechanical energy. | internal combustion |
| In an automobile engine, only about 20% of the chemical energy gets converted into mechanical energy; the rest becomes_____, which causes the engine to become hot. | heat |
| Heating continues between objects until they have reached the same ___. | temperature. |
Created by:
gstubblefield
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