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Mathews-Voc. P/C
chemical and physical change
| Term | Definition |
|---|---|
| chemical change | usually reversible change in the physicals properities of a substance, size or shape |
| physical change | irreversible chemical reaction involving the atom of one or more substances and a change in their chemical. |
| precipitate | separate from a solution as a percipitate |
| combustion | act of process of burning |
| natural | in a form by nature |
| synthetic | some times made by a synthetic or chemical process. |
| monomer | molecule of law molecular weight capable of reaction with identical or different molecules of law molector weight to for a polymer. |
| polymer | a compound of high molecular weight derived either by addition. |
| reactants | the chemical we have at the start of a reaction, always go to the left |
| product | substances formed in a reaction, always go to the right |
| natural resource | resources that are important to humans and are found in nature |
| List physical changes list an example | -a physical change -a change in a substance that does not change the substance -chang ein form or appearance example: cutting grass |
| What are some causes of physical changes | Grinding, cutting, crushing, bending, breaking, heating/cooling, squishing, stretching, flattening |
| Evidence of a phsycial change | change shape, form, size, state and are usually reversable. |
| What could you do to these items to cause a physical change? orange ice cookie | peel it melt smoosh it |
| what is a chemical change , give example | a chemical change is a change in which a substance is changed in to a different substance. silver rusting |
| Causes of chemical reaction | -a chemical reaction occurs when two or more molecules react. -bonds between atoms are broken or formed new molecules. Do you know the illustration? |
| Evidence of chemical change: give a descriptions color change- example? | new molecule created light differently producing new colors ex. leaves changing |
| Evidence of chemical change: give a descriptions temperature change- example? | energy is either released or absorbed. Making the surrounding hot or cold. example: fever |
| Evidence of chemical change: give a descriptions formation of percipitation give example | when solid suddenly appears in a solution and settles to the bottom. ex. chucks of sour milk |
| Evidence of chemical change: give a descriptions gas formed give example | when gases provided in a reaction are released ex. baking soda and vinegar |
| Evidence of chemical change: give a descriptions combustion burning example | reaction between substances usually including oxygen by giving off heat/light candle |
| Chemical or Physical change: Butterfly process: Grasshopper getting bigger: frying a egg: melting ice: | chemical physical chemical chemical phsyical |
| law of conservation of mass | matter cannot be created or destroyed, it simply changes forms |
| ______ of wood and oxygen= ___ of ashes, carbon dioxide, and water. | Burning forming |
| Natural vs synthetic | natural-found in nature, produce from bio process, easily broken down in nature artifically produced by humans, produces from chemical process, hard to break down (years to thousand of years) |
Created by:
Lawdermilt
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