Term
| What are the four classes of matter? |
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Definition
| Mixtures, solutions, elements and compounds |
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Term
| What is matter that consists of two or more substances mixed together but not chemically combined? |
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Definition
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Term
| What are three properties of mixture? |
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Definition
1. substances in mixture keep their properties
2. can see different particles and can be separated
3 not chemically combined |
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Term
| What are some examples of a mixture? |
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Definition
| cereal, sugar-water, concrete, granite |
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Term
| How are mixtures classified? |
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Definition
| The are classified on how well they are mixed. |
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Term
| Define heterogeneous mixture. Give example. |
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Definition
A mixture that does not appear to be the same throughout.
Example: Concrete or Oil & vinegar |
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Term
| What are some properties of heterogeneous mixtures? |
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Definition
| particles are large enough to be seen, can be separated |
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Term
| Define homogeneous mixture. Give examples. |
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Definition
A mixture that appears to be the same throughout.
Example: milk, toothpaste, steel, whipped cream |
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Term
| What are two properties of homogeneous mixtures? |
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Definition
1. particles are very small not easily recognizable
2. particles do not settle when mixture is allowed to stand |
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Term
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Definition
| simplest pure substance cannot be broken into something simpler |
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Term
| What is the smallest particle of an element that has the properties of that element? |
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Definition
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Term
| What are Chemical Symbols? |
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Definition
| a shorthand way of representing the element |
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Term
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Definition
| pure substances that are made of more than one element, (2 or more) elements that are chemically combined |
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Term
| Give examples of a compound. |
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Definition
| Baking Soda, carbon dioxide, sugar, TNT |
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Term
| How are compounds different than elements? |
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Definition
| Compounds can be broken down into simpler substances. |
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Term
| Properties of the elements that make up a compound are often quite ________________ from the properties of the compound. |
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Definition
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Term
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Definition
| it is made up of 2 or more atoms chemically bonded together. It is the smallest particle of a compound that has all the properties of a compound |
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Term
| Give example of compound. |
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Definition
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Term
| What are some general properties of matter? |
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Definition
| mass, volume, weight density |
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Term
| A _______________ property is when the characteristics of a substance can be observed without changing the identity of a substance. |
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Definition
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Term
| What are the different phases of matter? |
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Definition
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Term
| What phase of matter has a definite shape and definite volume? |
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Definition
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Term
| Why do solids have a definite shape? |
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Definition
| A solid has particles that are closely packed together, because of the arrangement they cannot move far or out of place or flow over or around each other. |
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Term
| What phase of matter has particles that are close together, free to move about, has no definite shape but has a definite volume? |
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Definition
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Term
| What phase of matter does not have a definite shape or a definite volume, fills all available space in a container, regardless of the size or shape of the container. |
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Definition
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Term
| What are the 3 phases of matter? |
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Definition
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Term
| What are the 3 different phases of water? |
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Definition
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Term
| What causes the particles of a substance to be in one particular phase rather than another? |
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Definition
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Term
| What can be said about the energy found in a gas compared to that of a liquid? |
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Definition
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Term
| By adding more energy to a substance, what does it do to the particles of that substance? |
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Definition
| Causes the particles to move faster and farther apart |
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Term
| What has to happen for ice to change to liquid water? |
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Definition
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Term
| What has to happen for water vapor to change to a liquid? |
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Definition
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Term
| A ______________ is when a substance changes from one form to another, but it remains the same kind of substance. |
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Definition
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Term
| What is the definition of melting? |
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Definition
| A change from a solid to a liquid. |
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Term
| Melting occurs when a substance _______________. |
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Definition
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Term
| What is the temperature at which a solid changes to a liquid called? |
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Definition
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Term
| What is the definition of freezing? |
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Definition
| phase change of a liquid changing to a solid |
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Term
| Freezing occurs when a substance ____________________. |
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Definition
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Term
| What is the temperature at which a liquid changes to a solid called? |
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Definition
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Term
| What is it called when a substance changes from a liquid to a gas? |
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Definition
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Term
| What has to happen to the heat energy for vaporization to occur? |
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Definition
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Term
| What is it the temperature called at which a liquid turns to a gas? |
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Definition
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Term
| Explain the difference between evaporation and boiling. |
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Definition
| Evaporation comes from the surface of the liquid and boiling is from within the liquid. |
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Term
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Definition
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Term
| What has to happen to the heat energy for condensation to occur? |
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Definition
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Term
| Other than the examples of color, shape, hardness, and texture used to describe physical properties, what other examples? |
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Definition
| melting/freezing point and boiling point |
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Term
| A _______________ property is when a substance changes into another new substance. |
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Definition
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Term
| Changes that substances undergo when they turn into other substances is called ________________________. |
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Definition
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