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Chapter 2 Vocab
Chapter 2 Vocab
7
Science
7th Grade
07/30/2012

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Term
Element
Definition
Made up of atoms, more then 100, each one has its own properties. Ex: oxygen is a colorless, odorless, flammable gas
Term
Molecule
Definition
Made up of two or more atoms. Ex: water is made up of two atoms of Hydrogen and one atom of Oxygen.
Term
4 main types of large molecules
Definition
Carbohydrates
Lipids
Proteins
Nucleic Acids
Term
Carbohydrates
Definition
Sub-units are sugars
Used for energy
C,O,H
Can form long chains of complex carb's like glycogen,cellulose and starch
Term
Lipids
Definition
Sub-units are glycerol and fatty acids
Fats, oils and waxes
C, O, H
Can be used as energy and for making important cellular structures like membranes
Term
Proteins
Definition
Sub-units are Amino Acids
Enzymes, cell growth and repair, transport
C, O, H, N, S
Term
Nucleic Acids
Definition
Sub-units are nucleotides
Holds blueprint for cells
C,O,H,N,P
Makes RNA and DNA for cellular information
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