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Introduction to ES

Riordan-PNHS-introduction to I.H.S vocabulary

What is an ELEMENT? A substance that cannot be broken down into smaller substances. It has a fixed composition because it contains only ONE type of atom.
Give an example of a pure substance. Salt, sugar, gold, silver, chlorine etc.
Kindly define PURE SUBSTANCE Matter that always has EXACTLY the same composition
What is a compound, give an example, please A substance made from two or more simpler substances and can be broken down into those simpler substances. It always contains two or more substances combined in a fixed proportion EXAMPLE: water!
What is a mixture? Example please! Tend to retain some of the properties of their individual substances. The properties of a mixture can vary because the composition of a mixture is not fixed. It CAN be broken down into smaller parts. EXAMPLE! Salsa, trail mix
Heterogeneous Mixture definition A mixture where the parts are noticeably different from one another. Example: Sand
Homogenous Mixture definition and example A mixture where the substances are so evenly distributed that it's hard to distinguish one bit of it from another
How can a mixture be classified? It is classified by the by the size of it's largest particles, and is put into one of three groups: solution, suspension, colloid
What is a solution? name one A solution is when substances dissolve and form a homogenous mixture EXAMPLE: salt water
What is a suspension? example, please A suspension is a heterogeneous mixture that separates into layers over time. EXAMPLE: Balsamic vinagarette dressing
Please explain a colloid! give an example A mixture that contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension EXAMPLE:homogenized milk
Created by: Diana Riordan