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| Come from what is observed and can be proven |
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| Conclusions based on facts but not necessarily directly observed. They can be valid or invalid. |
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| A person's ideas or thoughts toward something. |
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| The basic component of matter. It's also called the basic building block of matter. |
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| It is the smallest unit of an element. |
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| A substance that is made of only one particular type of atom and can not be broken down into a simpler substance. |
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| It is a single kind of matter that is pure and possesses a specific set of properties. |
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| How many known elements are there that make up matter? |
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| What are three types of elements? |
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| Metals, nonmetals, and metalloids |
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| What are three examples of a metal element? |
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| gold, silver, and mercury |
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| What are three examples of a nonmetal element? |
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| Hydrogen, nitrogen, oxygen |
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| What are three examples of a metalloid element? |
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| Two or more atoms joined together. |
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| two or more elements bonded together, or molecules that contain more than one type of element |
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| What is an example of a molecule? |
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| What is an example of a compound? |
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| What does MACE stand for? |
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Molecules contain more than one
Atom and a
Compound contains more than one
Element |
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| qualities or characteristics of matter that can be observed or measured WITHOUT changing the type of matter. For example: color, odor, texture, size, shape, density, conductivity, and mass. |
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| an event that alters the form or size of matter but does not change the type of matter. For example: when you chop wood you change the way it looks but you don't change the wood itself into something else. Same with braiding hair or molding clay. |
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| What are the 3 changes in the state of matter when making snow? |
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Water to vapor (evaporation)
Vapor to water (condensation)
Water to snow (precipitation) |
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| What are the three states of matter? |
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| An event which rearranges chemical bonds and forms one or more new substances with different properties. For example, when you cook an egg or burn toast you change it's form. Often chemical changes can not be reversed. |
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| the force of attraction that holds atoms together within a molecule. Hydrogen and oxygen are held together by a chemical bond because each atom is slightly positive and slightly negative |
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| The force that attracts molecules to one another. They are easy to break because they are weak bonds. |
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| Johannes Diderik van der Walls |
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| He was a dutch physicist who was known for discovering that the state of matter is due to the forces between molecules. |
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| What type of changes (physical or chemical) affect van der waals forces? |
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| They affect chemical bonds which are strong bonds and store a lot of energy. It's hard to break them apart. |
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| Scientific law about matter |
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| Energy and matter can NOT be created or destroyed, only changed |
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| What does ex nihilo mean? (it's in latin) |
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