Types of Energy
Energy associated with movement
What is kinetic energy
This law is used to explain why energy cannot be created or destroyed
What is the Law of Conservation of Energy
The definition of the word efficiency
What is the amount of useful energy get from total energy input
The difference between a chemical change and a physical change is
What is chemical change is irreversible whereas physical change is reversible
The three particles that make up an atoms are
What is the proton, neutron and electron
Energy associated with the fusing or separating of atoms
What is nuclear energy
When heat energy is transferred from one object to another, the objects are really transferring this kind of energy
kinetic energy
A light bulb that converts 90% of electrical energy into light energy is considered very
What is energy efficient
Cooking an egg is an example of
What is chemical change
This substance is made of two or more atoms chemically bonded together
What is a molecule
This type of energy decreases when an object falls from a great height
What is Gravitational Potential Energy
A roaring fire is an example of this kind of heat transfer
What is radiation
The leading cause of energy inefficiency is that
What is materials that are bad at tranforming useful energy
A melting candle is an example of
What is a physical change
This substance is made of two or more different elements chemically bound in a specific ratio
What is a compound
Found in stretched or compressed objects like springs or rubber bands, this is a form of potential energy
What is Elastic Potential Energy
The type of energy transfer that occurs when particle density changes. E.g Warm air has less dense particles compared to cold air
What is convection
During a chemical change, the molecules and compounds of the substance
What is rearrange and form new substances
This substance is pure and made of only one type of atom
What is an element
This type of energy increases when two objects touch and move in opposite directions, or when an object moves extremely fast
What is heat energy
The one directional flow of electrons
What is an electric current
Why is it important for devices to be energy efficient?
What is to use less energy to do the job the device was designed for
A chemical change is irreversible because
What is the atoms that make up the molecules and compounds don't recombine in the same combinations again
Balance the following chemical equation
H2 + 02 --> H20
What is 2H2 + O2 --> 2H2O