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Unit 1 Review 6th Gr

Unit 1 Review 6th Grade

TermDefinition
Atom Smallest particle of an element, made of electrons, protons, & neutrons.
Element Pure substance composed of the same type of atom throughout.
Compound Substance made of 2 or more elements that are chemically combined in fixed amounts.
Substance Any form of matter that is uniform throughout & has consistent properties.
Periodic Table of Elements Table in which all the known elements are arranged by properties & are represented by 1 or 2 letters, referred to as chemical symbols.
Matter Anything that has mass & takes up space.
Properties Physical & chemical characteristics of matter used to describe or identify a substance.
Volume Measure of the space that matter occupies.
Mass Measure of how much matter is present in a substance.
Mixture Combination of 2 or more substances which do not chemically combine.
Uniform Composition Made of the same evenly distributed substance or combination of substances throughout; uni = one
ELEMENT Pure substance composed of the same type of atom throughout.
CHEMICAL CHANGE Change that alters the identity of a substance resulting in a new substance or substances with different properties.
PHYSICAL CHANGE Change to a substance that occurs without forming a new substance, such as a change in size or state of matter.
CHEMICAL PROPERTY Characteristic that can only be observed or measured when atoms of matter rearrange during a chemical change.
PHYSICAL PROPERTY Characteristic that can be observed or measured without changing the substance; for example, color, melting point, or conductivity.
COMPOUND Substance made of 2 or more elements that are chemically combined in fixed amounts.
PROPERTIES Physical & chemical characteristics of matter used to describe or identify a substance.
STATES OF MATTER Distinct forms of matter known in everyday experience: solid, liquid, & gas; also referred to as phases.
PRODUCTION OF HEAT OR LIGHT Evidence of release of energy during a chemical change.
PRODUCTION OF PRECIPITATE Evidence of a new substance formed from a chemical change, resulting in solid particles that form or separate out of a liquid.
PRODUCTION OF GAS Evidence of a new substance formed from a chemical change.
SUBSTANCE Any form of matter that is uniform throughout & has consistent properties.
COLOR CHANGE Change in the way something reflects light, can indicate a chemical change.
TEMPERATURE CHANGE Increase or decrease of heat energy in a substance may be evidence of a new substance formed during a chemical change.
MATTER Anything that has mass & takes up space.
CITY - GIRLS - LEAVE - THEIR - PHONES - ON Mnemonic device to help remember the 6 evidences of a CHEMICAL change: C = COLOR change G = GAS formation (not phase change) L = LIGHT produced T = TEMP. change (not phase change) P = PRECIPITATE formation O = ODOR produced
Periodic Table of Elements Table in which all the known elements are arranged by properties; represented by 1 or 2 letters, known as chemical symbols.
Physical Property Measurable characteristics that describe the physical state of something, including mass, magnetism, temperature, density, shape, volume, & conductivity.
Metals Most elements are metals; they're typically solid, shiny, malleable, & good conductors of heat & electricity.
Non-Metals Elements that are typically not shiny, not malleable, & poor conductors of heat & electricity; usually gases or brittle solids.
Metalloids Elements that have properties of both metals & nonmetals; sometimes referred to as semiconductors.
Luster The way the surface of a mineral reflects light; either metallic or non-metallic such as silky, dull, glassy, or resinous.
Conductivity The ability of a substance to transfer heat or electrical energy.
Malleability The ability of something to be reshaped without breaking.
Brittle A tendency to break rather than flex or bend.
Insulator A material that does NOT conduct heat or electrical current.
Conductor A substance that readily transfers heat or electrical energy.
Semiconductor A substance that shows the property of electrical conductivity between that of a conductor & that of an insulator; foundation of modern electronics.
Matter Anything that has mass & takes up space.
Classify Sort or put into groups based on similar & dissimilar physical, chemical, or biological characteristics.
Element A pure substance composed of the same type of atom throughout.
MASS Measures how much matter is present in a substance.
GRAM, g Basic metric unit of mass.
VOLUME Measure of the space that matter occupies.
CUBIC CENTIMETER, cm³ Metric unit of volume equal to a milliliter.
MILLILITER, mL Metric unit of volume.
VOLUME BY DISPLACEMENT Procedure that measures volume of irregular objects by placing in a known amount of water & measuring the water displaced.
MATTER Anything that has mass and takes up space.
SUBSTANCE Any form of matter that is uniform throughout and has consistent properties.
PHYSICAL PROPERTY Characteristic that can be observed or measured without changing the substance, e.g. color, melting point, or conductivity.
DENSITY Mass of a substance divided by its volume.
RELATIVE DENSITY Comparison of the density of 1 material as it relates to another; frequently compared to the density of water (sinking or floating).
DENSITY FORMULA Density equals Mass divided by Volume; Density=mass/volume; D=m/V
CLASSIFY/CLASSIFICATION Sort or put into groups based on similar and dissimilar physical, chemical, or biological characteristics.
MINERAL Naturally formed, inorganic solid that has a specific chemical formula & repeating 3-dimensional structure.
LUSTER Way the surface of a mineral reflects light; either metallic or non-metallic, such as silky, dull, glassy, or resinous.
STREAK Color of a mineral in powdered form.`
HARDNESS Measure of scratch resistance of various minerals; when the ability of harder minerals to scratch softer minerals is used for identification.
CONDUCTIVITY Ability of a substance to transfer heat or electrical energy.
MALLEABILITY Ability of something to be reshaped without breaking.
MAGNETIC ATTRACTION Magnetic force exerted by oppositely charged particles, tending to draw or hold the particles together.
INORGANIC Matter that does not contain carbon; abiotic.
MINERAL CRYSTAL Geometric shape of a mineral that reflects its internal crystalline arrangement of atoms.
MOHS HARDNESS SCALE Set of 10 minerals used as a standard of hardness against which an unknown mineral's hardness is compared.
PHYSICAL CHANGE A change to a substance WITHOUT forming a new substance; e.g. breaking a substance into smaller particles, changing an objects shape, phase changes, etc.
PHASE CHANGE Type of PHYSICAL change in which: 1. Solids can MELT into Liquids 2. Liquids can EVAPORATE into Gases 3. Gases can CONDENSE into Liquids 4. Liquids can FREEZE into Solids The produced substance is the SAME as the original substance.
CHEMICAL CHANGE A change that alters the identity of a substance, resulting in a NEW substance or substances with different properties; e.g. burning something, exposure to air and/or water, combining different chemicals, pulling compounds apart, etc.
CITY - GIRLS - LEAVE - THEIR - PHONES - ON Mnemonic device to help remember the 6 evidences of a CHEMICAL change: C = COLOR change G = GAS formation (not phase change) L = LIGHT produced T = TEMPERATURE change (not phase change) P = PRECIPITATE formation O = ODOR produced
PRECIPITATE Solid produced when 2 different liquids are combined; the result of a CHEMICAL change.