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Unit 4 Test Review
Energy Test
| Question | Answer |
|---|---|
| What is the law of conservation of energy? | Energy is not created or destroyed only transformed. |
| What is heat? | The movement of thermal energy from a warmer object to a cooler object. |
| What is the relationship between kinetic energy, mass and velocity? | As kinetic energy increases, mass and velocity increase too. |
| What is mechanical energy? | The sum of all potential and kinetic energy particles in an object. |
| What is the difference between insulators and conductors? | Insulators do not conduct heat well and conducters do conduct heat well. |
| Describe the relationship between work and energy. | Without energy, no work can be done. |
| Descrribe the energy transformation in a generator. | Generators take mechanical energy and transform it into electrical energy. |
| What is the relationship between the amount of particles in a substance and the thermal energy? | The more particles, the more thermal energy. |
| Heat moves from _______ objects to _______ obects? | Warmer to cooler. |
| What is thermal energy? | The total potential and kinetic energy of the PARTICLES in an object. |
| What are 3 types of heat transfer? | Conduction, Convection and Radiation. |
| Conduction & 2 examples- | A process of transferring heat from one particle of matter to another without the movemment of matter. Ex: ice melting in your hand, heating a pot on the stovetop. |
| Convection & 2 examples- | A process of transferring heat by the movement of currents within a fluid; the flow of the current flows in a circular motion called convection currents. Ex: heating a liquid in a pot on the stovetop;radiatior,ceiling fans. |
| Radiation & 2 examples- | A process of transferring energy by electromagnetic waves. Ex: the sun's rays heating the earth, warming your body by a camp fire, fireplace. |
| What is specific heat? | The amount of energy required to raise the temperature of 1 kg of a material by 1 kelvin. |
| What is the formula for converting degrees to Celsius to the Kelvin scale? | K= oC + 273 |
| Velocity- | Speed in a given direction. |
| Newtons 1st law- | Object at motion stays in motion, unless acted on by an outside force. |
| Newtons 2nd law- | Acceleration depends on the object's mass and on the net force acting on the object. |
| Newtons 3rd law- | For every action, there is an equal and opposite reaction. |
| Potential- | Stored energy due to an object's position or shape. |
| Gravitational Potential-- | Potential energy that depends on height. |
| Kinetic- | Energy of motion. |
| Elastic Potential-- | Potential energy associated with objects that can be stressed or compressed. |
| Nuclear- | Energy stored in the nucleus of an atom. |
| Thermal- | The total potential and kinetic energy of the PARTICLES in an object. |
| Chemical- | Potential energy stored in the chemical bonds that hold chemical compounds together. |
| Electrical- | The energy of moving electrical charges. |
| Electromagnetic- | A form of energy that travels through space as waves. |
| Heat lost/gained= | Mass x specific heat x change in temp. |
Created by:
Avery Lamb
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