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Science test - Energ

QuestionAnswer
What is energy? Energy is the ability to work. There are many different forms of energy such as, kinetic, electrical, sound, heat, and light
Law of conservation energy 1. The amount of energy in the universe is always the same 2. Energy cannot be created or destroyed 3. Energy can be stored 4. Energy can transferred to another object or transformed into a different form
What do we know about energy? All things possess energy even if they are not moving Energy can be transferred to another object Energy can be transformed into a different form Energy can be stored
Types of energy Gravitational, elastic, chemical, nuclear, electrical, kinetic, heat, light, and sound
Definition of efficiency The total useful energy and total input energy
What is the formula for efficiency Useful energy divided by total input energy times 100%
Heat energy and transfer - Conduction When heat is transferred by a substance flowing from a warmer are to a cooler are through direct contact between two solid objects
Heat energy and transfer - Convection When heat is transferred by a substance flowing from a warmer area to a cooler area in liquids or gases
Heat energy and transfer - Radiation The transfer of heat from electromagnetic waves
Heat energy and transfer - What happens to radiate heat? Heat from the sun cannot get to earth by conduction or convection because there are not enough particles in space
Conduction or transmission The ground heats the air
Convection or absorbsion The warm air rises
Radiation or reflection The sun heats the ground
How to keep your house warm in winter - Places where heat is lost Ceilings (25-35%).
How to keep your house warm in winter - How to prevent the heat loss Improve your names insulation in walls, ceilings, windows, floors, and block air leaks around doors and windows with weather stripping and seals
How to keep your house warm in winter - Conductors of heat Materials that allow heat to pass through them easily such as, silver, wood, rubber, gold, and steel
How to keep your house warm in winter - Insulators of heat (poor conductors) Poor conductors of heat, include materials like, wood, plastic, rubber, and grass
How to keep your house warm in winter - How a convection heater works at home? By drawing cold air in, heating it over an element, and then releasing the warm air into the room to create a natural circulation pattern.
Types of energy: definitions - Gravitational Potential energy of an object elevated above the ground
Types of energy: definitions - Elastic Energy stored by an elastic object that is stretched, such as a spring or rubber band
Types of energy: definitions - Chemical Energy is stored in chemicals that, when reacted together such as, in burning reactions, release heat, sound or light
Types of energy: definitions - Nuclear Energy stored in the nucleus of atoms that can release energy slowly such as in a nuclear reactor, or quickly, such as in a nuclear explosion
Types of energy: definitions - Electrical Energy supplied to homes by powerlines and available to your appliances via power outlets in the home
Types of energy: definitions - Kinetic Energy possessed by objects that are moving
Types of energy: definitions - Heat Energy that causes objects to gain temperature
Types of energy: definitions - Light Energy that may be released, for example, when an object is hot or by a nuclear reaction in a star
Types of energy: definitions - Sound Energy carried by the air in a room and detected by the ear
Heat we feel from the sun is? Radiation
The heat you feel when you touch a hot stove Conduction
Heat you feel when you put your hands above a fire Convection
What is a sanky diagram? Showing the amount of useful and non-useful energy produced in an energy transformation
Created by: Sienna Psaila
 

 



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