Matter And Energy Flashcards
(27 cards)
What can NOT happen to energy
Created or destroyed
What is the unit of measurement for energy
Joules
What is meant by energy store.
A way in which a system stores energy
What happens to the energy store when energy is transferred out of it
The store empties
What happens to an energy store when energy is transferred into it
It fills up
Name four important energy pathways
Heating, radiation, mechanical working and electrical working
What energy store fills when energy is dissipated
The thermal energy of the surroundings
What is the term for energy that hasn’t been useful to device or process.
Wasted energy (dissipated energy)
What is the name of the energy store with fuels and food
The chemical store
Stretching a rubber band fills which store
Elastic potential store
What must an object do to fill its kinetic store
It must move
When an apple falls from the tree what store is being filled
The gravitational potential store
When a bow string is being pulled back what energy store is being filled
The elastic store of the bow
The movement of particles inside an objects is the source of which store
Thermal store
When an object is heated what happens to the particles
Vibrate /move faster
What instrument can be used to measure how hot an object is
Thermometer
If hot object is put in contact with a cold object in which way would the energy transfer
From the hotter object to the colder object
What unit do we measure temp in
The degree Celsius
Thermal energy can transfer between a hot and cold object in 3 ways what are they
Conduction, convection and radiation
Which of the 3 states of matter is best at transferring energy by conduction
Solid
Which way of transferring thermal energy happens only in liquids and gas
Convection
What is meant by the term radiation
When energy is transferred as a wave
What is the name of the invisible radiation given off by a warm object such as a human being
Infra-red radiation
What is the name given to a stream of fluid which rises due to heating and falls when it cools
A convection current
