Elements & Matter
Represented by a chemical formula.
Compound
Can be observed without changing the substance.
Physical properties
3 types of elements on the periodic table.
Metals, non-metals, and metalloids
Energy is?
The ability to do work or to make change within a system.
Define conduction
Conduction occurs when 2 substances of different temperatures touch causing the transfer of thermal energy.
Has mas and take up space,
Matter
Examples of physical properties
Color, melting point, conductivity
Another word for shiny
Luster
Energy of position is...
Potential energy
Define convection.
Convection is the transfer of thermal energy that occurs due to circular motion caused by heating and cooling in fluids.
2 types of pure substances
Elements and compounds
Signs of a chemical change
Production of a gas, color change, giving off heat or light, precipitate formation.
These conduct electricity and heat.
metals
Energy of motion is...
Kinetic energy
Radiation is...
The transfer of thermal energy by electromagnetic rays. Energy will move in a predictable pattern from a warmer site to a cooler site until all sited have reached the same temperature.
can be broken down by physical means
mixtures
A list of all the known elements
Periodic table
sometimes they conduct and sometimes they don't.
semiconductors/metalloids
The total energy in a system consists of....
the total potential energy + the kinetic energy.
What are the processes by which thermal energy can transfer?
Conduction, convection, and radiation
Represented by a chemical formula.
Compound
Cannot be broken down further.
Elements
Are usually dull and brittle.
Non metals
The law of the conservation of energy states that.....
Energy cannot be created nor destroyed but it can be transformed or transferred.
Energy transformation within a system demonstrate what?
The law of the conservation of energy.