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Chemical & Physical
| Question | Answer |
|---|---|
| Physical Property | characteristic of matter that can be observed and measured without changing the identity or chemical makeup of the substance. Color, odor, size, hardness, luster, phase of matter, mass, density, boiling point, melting point, solubility, and conductivity |
| Color | We can easily observe the color of a substance by looking at it. |
| Odor | Many substances have a noticeable odor. |
| Size | The size of a substance can be measured without altering the chemical makeup of the substance. |
| Hardness | Hardness is the measure of how difficult or easy it is to scratch a substance. |
| Luster | Luster describes how light is reflected off the surface of an object. (How shiny is the object?) |
| Mass | The amount of matter in a object |
| Weight | is mass times gravity |
| Density | how tightly packed the atoms in an object are. |
| Boiling Point | Is the point at which a substance changes from a liquid to a gas |
| Melting Point | Is the point at which a substance changes from a solid to a liquid. |
| Solubility | Is the measure in which an object dissolves into another object |
| Electrical Conductivity | Is the measure of a material's ability to allow the transport of an electric charge. |
| Chemical Property | Is a trait or behavior of a substance that gives it the ability or inability to undergo a chemical change. A chemical property can only be observed when the substance is going through a chemical change or reaction. |
| Combustibility and Flammability | Both mean the ability a substance has to burn |
| Combustion | Is a chemical reaction that produces heat and light. |
| Toxicity | Is the ability or strength of a substance to cause poisonous effects to living things. |
| Reactivity | How easily an atom has a chemical reaction with another element |
| Physical Change | a change that happens without changing the chemical composition of a substance No new substance is formed The change is usually but not always reversible The form, size, shape, or color of an object can change without affecting what makes up the substance |
| Chemical Change | occurs when a substance undergoes a change that creates a new substance with different chemical and physical properties than the original substance. The change is not reversible. |
| What causes the odor when milk sours? | When milk begins to ferment (break down), it smells bad because of the bacteria that is being formed. Chemicals with a sour odor are released by this bacteria. |
| What causes the bubbles in a chemical reaction? | Some chemical reactions occur and cause a gas to form. The bubbles are the evidence of the gas fumes escaping. |
| What is a precipitate? | It is an insoluble (can’t dissolve) solid that is formed when two liquids combine. |
| Examples of Physical Properties | Malleable, Color, Odor, Conductivity, Ductile, Boiling Point, Melting Point, Luster, Size, Luminescence, Metal, Metalloid, Phase, Density, Hardness, Solubility, Magnetism, Ability to Dissolve, Specific Gravity, |
| Examples of Chemical Properties | Oxidation, Flammability, Toxicity, Combustibility, Reactivity, Radioactivity |
Created by:
Rilynn
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