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The Chemistry of Materials
Vocabulary within the unit
23
Science
7th Grade
11/17/2011

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Cards

Term
Materials Scientist/Engineer
Definition
study materials and make new ones
Term
material
Definition
type of solid matter used to make things
Term
life cycle
Definition
stages a material goes through
Term
property
Definition
a certain characteristic of a material
Term
manufacturing
Definition
how you design and make an object
Term
useful life
Definition
what you use something for
Term
end of life
Definition
what do you do with a material when you are finished using it
Term
raw material
Definition
materials that come from the earth
Term
physical property
Definition
a characteristic of a substance or material such as color, density, flexibility, or hardness.
Term
chemical property
Definition
describes how a material reacts with another material
Term
Atom
Definition
basic building blocks of matter that make up everyday objects
Term
Atomic Mass
Definition
How many protons an element has. The periodic table is organized according to them.
Term
Element
Definition

make up all other substances and are composed of one kind of atom

examples: Hydrogen (H), Oxygen (O), Sodium (Na), Calcium (Ca)

 

Term
periodic table of elements
Definition
pure substances organized according to their atomic mass and the type of properties they have (all elements)
Term
chemical formula
Definition
shorthand way to identify the kind and number of atoms that make up a compound.
Term
react/reactive
Definition
when elements combine chemically
Term
Compound
Definition
a substance made up of two or more different elements that have combined in such a way that the elements have lost their own physical & chemical properties.
    ex:  water (H2O), table salt (NaCl)
Term
molecule
Definition
what you get when any atoms join together chemically
Term
chemical bond
Definition
bond between two or  more elements
Term
bond
Definition
how compounds are held together
Term
mixture
Definition
combination of two or more substances (elements/compounds) that are held together by bonds but can be separated into their original parts
Term
Chemical Change
Definition
When two or more elements react together chemically and loose their original properties
Term
Physical Change
Definition
When an object changes phase but is still the same object
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