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8TH GRADE SCIENCE REVIEW: TRIMESTER 2

AB
Carbon atomsThey have 4 valence electrons and form more bonds than most other atoms. Found in more than 90% of all compounds, organic compound
DiamondThe hardest mineral, forms deep in the earth’s crust at very high temperatures and pressures. It’s melting point is over 3,500 C.
GraphiteCarbon atoms are bonded strongly in flat layers. Its surface is slippery and can be used as a lubricant. You can also find it in pencils
FullerenesCarbon atoms arranged in a repeating pattern similar to a soccer ball.
Organic CompoundAll compounds, with some exceptions, which contain carbon… low melting point, and low boiling point
HydrocarbonsCompound of only carbon and hydrogen, in any number or pattern: flammable, release energy, and mix poorly with waterCompound of only carbon and hydrogen, in any number or patternCompound of only carbon and hydrogen, in any number or pattern: flammable, release energy, and mix poorly with water
Molecular formulaIncludes the chemical symbols of the elements in each molecule of a compound as well as the number of atoms of each atom in the compound.
SubscriptsThe small number that indicated the number of atoms of each element in a molecular formula
Structural FormulaShows the kind, number, and arrangement of atoms in a molecule
IsomersCompounds that have the same molecular formula but different structures
Saturated hydrocarbonsHydrocarbons with only single bonds
Unsaturated hydrocarbonsHydrocarbons with double or triple bonds, with fewer hydrogen atoms.
Substituted hydrocarbonsAtoms of other elements replace one or more hydrogen atoms in a hydrocarbon.
Hydroxyl GroupCan substitute for a hydrogen atom in a hydrocarbon…. HO
Organic AcidA substituted hydrocarbon that contain one or more of the following groups: COOH
Carboxyl GroupCOOH
Estera chemically combined alcohol and organic acid
PolymerA very large molecule made of a chain of many smaller molecules bonded together • proteins • carbohydrates • lipids • nucleic acids
MonomersThe smaller molecule in a polymer, making a link in the chain
SyntheticMolecules made in factories
NutrientsSubstances that provide the energy and raw materials that the body needs to grow, repairing worn parts, and function properly. Most are organic compounds
DigestionThe process through which polymers are broken down into monomers
CarbohydrateEnergy rich organic component made o carbon, hydrogen, and oxygen
Simple CarbohydratesSugars, glucose
GlucoseBlood sugar
Complex CarbohydratesMade from a long chain of simple carbohydrates bonded to each other.
StarchAn organic compound which is a polymer of amino acids
CelluloseA complex carbohydrate found in plant structures
ProteinsAn organic compound which is a polymer of amino acids
Amino AcidsOne of 20 kinds of organic compounds that are the monomers of proteins
LipidsAn energy rich polymer made of carbon, oxygen, hydrogen, fats, oils, waxes, and cholesterol.
Fatty acidAn organic compound that is a monomer of a fat or oil
CholesterolA waxy lipid found in all animal cells.
Nucleic acidsA very large organic compound made up Carbon, oxygen, Hydrogen, Nitrogen, and Phosphorus. DNA, and RNA
VitaminsAn organic compounds that serves as a helper molecule in a variety of chemical reactions in the body.
MineralA simple element needed by the body that is not organic.


English Teacher

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