Term Definition
Solid -A definite shape, a definitive volume, particles close together, strong attractive forces between particles.
Liquid -no definite shape, a definite volume, particles close together, weaker attractive forces between particles than in solids, particles free to move past neighboring particles
Gas -no definite shape, no definite volume, particles very far apart, very weak attractive particles that are very far apart, particles move freeky
Law of conservation of Mass the total mass before a chemical reaction is the same as the total mass after a chemical reaction
Mass the amount of matter in an object
Weight the gravitational pull on the mass of an object
Volume the amount of solute that can be dissolved in a given amount of solvent at a given temperature and pressure
Density the mass per unit volume of a substance
Melting Point when a material changes from a solid to a liquid
Boling point when a material changes from a liquid to a gas
Formula for density Density = mass/ volume
Physical change a change in the size, shape, form, or state of matter that does not change the matter's identity
Chemical change a change in matter in which the substance that makes up the matter change into other substances with different chemical and physical properties
Law of Conservation of Energy energy can be transformed from one form into another or transferred from one region to another, but energy cannot be created or destroyed.
Kinetic Energy Energy due to motion
Potential Energy stored energy due to the interaction between objects or particles
Gravitational Potential Energy stored energy between the earth and an object
Elastic Potential Energy stored energy in an object that are compressed or stretched
Chemical Potential Energy stored energy in the chemical bonds between atoms
Mechanical Energy the sum of potential energy and kinetic energy in a system
Sound Energy the energy that sound carries
Thermal Energy the sum of kinetic energy and potential energy of particles that make up an object
Electric Energy the energy an electric current carries
Radiant Energy the energy that electromagnetic waves carry
Nuclear Energy energy that is stored and released in the nucleus of an atom
Hypothesis an informed guess that can be tested
prediction a statement of what will happen next in a sequence
qualitative observation an observation made using you senses
quantitative observation an observation made through measurements
dependent variable information gathered or measured during an experiment
independent variable the variable that changes in an experiment
data information gathered during an experiment

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