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15 Cards in this Set
- Front
- Back
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Define the term CHEMISTRY
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Chemistry is the study of the structure and properties of matter.
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Define the term MATTER
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Matter is any substance that has mass and occupies space.
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Define the term ENERGY
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Energy is defined as the capacity to do work.
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Define the physical properties of matter.
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Physical properties are those that can be observed or measured without affecting the identity of the substance.
Examples include colour, density, melting or boiling point, physical state, shape, odour, taste or hardness. |
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Define the term PHYSICAL CHANGE.
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A physical change occurs when a substance changes its appearance, but not its chemical composition.
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Define the term INFORMATION.
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Information becomes communication or remains as data.
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Define the term CHEMICAL PROPERTY
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A chemical property is a characteristic of a substance that describes the way the substance undergoes or resists change to form a new substance.
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Define the term CHEMICAL CHANGE.
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A chemical change, or chemical reaction occurs when the chemical composition of a substance is altered.
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Define the term ELEMENT.
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Elements are primary substances from which other substances (compounds, mixtures, molecules) are built. They cannot be broken down into simpler substances.
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Define the term COMPOUND.
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A compound is a pure substance composed of two or more elements that can be broken down into two or more simpler substances.
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Define the term MIXTURE.
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A mixture is a physical combination of two or more pure substances in which each substance retains its own chemical identity.
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Describe the difference between ORGANIC and INORGANIC chemistry.
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Organic chemistry is the study of compounds that contain carbon. Inorganic chemistry is the study of substances that do not contain carbon.
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Identify the difference between a PHYSICAL change and a CHEMICAL change.
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In a physical change the chemical composition of a substance does not change. In a chemical change, the chemical composition of the substance is altered.
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Identify and describe the three states of matter.
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Solid: Do not conform to shape. Close together and organised.
Liquid: Conforms to shape, forms surface. Separated, disorganised, collide frequently. Gas: Fills the container but no surface. Random, far apart, colliding occasionally. |
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What are the four main differences between a compound and a mixture?
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Properties: C - differ M - retain
Composition: C - definite M - variable Bonding: C - bound M - not bound Separation: C - Chem M - Filter, evap |
