Chemical changes
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Examples of physical properties | Color, odor, size, hardness, luster, phase of matter, mass, density, boiling point, melting point, solubility, conductivity
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| color | Physical property; can be observed by looking at it
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| odor | Physical property; many substances have a noticeable odor
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| size | Physical property; can be measured without altering the chemical makeup of the substance
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| hardness | Physical property; the measure of how difficult or easy it is to scratch a substance
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| luster | Physical property; describes how light is reflected off of the surface of an object (How shiny is it?)
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| mass | Physical property; measures the amount of matter in an object
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| weight | Physical property; measures the force of gravity on an object
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| density | Physical property; how tightly packed the atoms in an object are; mass divided by volume
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| Boiling point | Physical property; the point at which a substance changes from a liquid to a gas
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| Melting point | Physical property; the point at which a substance changes from a solid to a liquid
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| solubility | Physical property; the measure in which an object dissolves into another object
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| Electrical conductivity | Physical property; the measure of a material’s ability to allow the transport of an electrical charge
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| Chemical property | A trait or behavior of a substance that gives it the ability or inability to undergo a chemical change; can only be observed when the substance is going through a chemical change or reaction
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| Examples of chemical properties | reactivity, combustibility (flammability), and toxicity
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| reactivity | Chemical property; how easily an atom has a chemical reaction with another element
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| Combustibility and flammability | Chemical property; the ability a substance has to burn
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| combustion | Chemical property; a chemical reaction that produces heat and light
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| toxicity | Chemical property; the ability and strength of a substance to cause poisonous effects to living things
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| Physical change | Change that happens without changing the chemical composition of a substance; no new substance is formed; usually (but not always) reversible
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| Chemical change | Occurs when a substance undergoes a change that creates a new substance with different chemical and physical properties than the original substance; not reversible
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Created by:
JoshuaFord23