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chemical & physical
chemical and pysical
| Question | Answer |
|---|---|
| what is a physical property? | can be observed without changing the identity or makeup of the substance |
| 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?) |
| The boiling point is the point at which a substance changes from a ___________________ to a ______________. | liquid to a gas |
| The melting point is the point at which a substance changes from a _______ to a ____________________. | solid to a liquid |
| mass | the amount of matter in an object |
| weight | mass x gravity (weight changes!) |
| density | how tightly packed the atoms in an object are. |
| solubility | the measure in which an object Dissolves into another object.. |
| electric conduction | the measure of a material's ability to allow the transport of an electric charge. |
| chemical property | a trait or behavior of a substance that gives it the ability or inability to undergo a chemical change |
| combustibility and flammability | the ability a substance has to burn |
| combustion | a chemical reaction that produces heat and light. |
| toxicity | the ability or strengths of a substance to cause poisonous effects to living things. |
| physical change | a change that happens without changing the chemical composition of a substance (usually reversible) |
| chemical change | occurs when a substance undergoes a change that creates a new substance (not reversible) |
| examples of physical property | color, odor, size, hardness, luster, phase of matter, mass, density, boiling point, melting point, solubility, and conductivity. |
| examples physical change | form, size, shape, or color of an object can be changed without affecting what makes up the substance. |
| reactivity | the state or power of being reactive |
| 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. (chemical) |
| physical property | color, odor, ductile, malleable, metal, nonmetal, mataloid boiling point, size, hardness, solubility, ability to dissolve, luster, conductivity, density, malleable, specified gravity |
| chemical property | oxidation, flammability, combustibility, radioactivity, toxicity, reactivity |
| physical change | example of dissolving, cutting, phase change |
| chemical change | formation of compound, example of reacting, example of oxidation, example of toxcicity |
Created by:
mal14
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