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Chem:Lesson1

Matter and Energy

QuestionAnswer
What is an Element? a pure substance that cannot be separated into simpler substances by physical or chemical means
What is a compound? It is a combination of two or more different elements that are chemically combined
What is a mixture? A mixture is a combination of two or more pure substances in which each pure substance keeps its individual chemical properties.
Difference between Homogenous and Heterogeneous mixtures. Homogenous:When the 2 substances are equally distributed. ex. Lemonade, Salt Water Heterogeneous: When the components are not equally distributed. Ex. Italian Dressing
Filtration Filtration is a technique that separates the components of a mixture using a porous barrier.
Distillation When you boil two substances to seperate them or to boil a substance out of the mixture.
Crystallization a separation technique that results in the formation of pure, solid particles of a substance that had been dissolved in a solution.
Chromatography is a technique that separates the components of a mixture on the basis of the tendency of each component to travel across the surface of another material.
What is Matter and what four states does it happen in? anything that has mass and takes up space. It can be in a solid form, liquid, gas, or plasma.
What is weight? weight is a measure of the gravitational pull on matter
Physical Properties of a substance Extensive: Mass, Density, Melting Point, Boiling Point, Temperature Intensive: Color, Hardness, Malleability, Conductivity, Odor
Chemical Properties Potential to Rust, Potential to Explode, Potential to react with acid, Potential to decompose
Chemical Properties Potential to Rust, Potential to Explode, Potential to react with acid, Potential to decompose
physical change A change that does not affect the basic nature of a substance
Chemical Properties Potential to Rust, Potential to Explode, Potential to react with acid, Potential to decompose
physical change A change that does not affect the basic nature of a substance. Ex: Melting Ice
Chemical Change A change that affects the basic nature of a substance.
Potential Energy measures the distance an object is from the earth’s surface
Kinetic Energy the energy of motion
What is The Law of Conservation The law of conservation of energy states that energy cannot be created or destroyed; the total amount of energy in the universe is constant
Created by: Sydbriggs