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| the science of matter and the transformation it can undergo |
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| what is the name of the anticancer drug we talked about? |
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| what tree has cancer-fighting abilities |
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| what is the active chemical in the yew bark that helps fight cancer |
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| why is the yew bark a poor source? |
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| removing bark kills the tree and it takes 6 100 yr. old trees to treat one patient |
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| whhat was the new source found to get paclitaxel from? |
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Definition
| English yew needle (common, fast growing, doesn't kill tree) |
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| how does paclitaxel work? |
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| hinders cell division so cancerous cells won't multiple fast as they normally would |
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| paclitaxel prevents _____ breakdown and binds in a pocket of ______ |
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| name one other more effective drug than paclitaxel? |
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| a tentative idea to explain observations |
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| summarizes a large number of experiments |
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| a unifying principle to explain a body of facts and the laws based on them |
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| physical properties can be measured by changing the ______ of a substance |
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| the same substance is present before and after this |
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| 3 things that may change in a physical change |
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1. physical state
2. gross shape (copper wire flat)
3. shape (cut wood in two) |
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| measures relative energy content of an object |
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| temperature measures relative _______ of an object |
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| energy transfers from _____ temp. to ____ temp. |
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water freezes...
water boils...
normal body temp.... |
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| canceling units to get desired units and using numbers and units to check |
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| a chemical reaction that a substance can undergo |
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| reactant atoms rearrange into different substances |
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| the capacity to do work or make something happen |
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| two or more substances in the same phase that are completely uniform |
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| properties in one region differ from the properties in another region (microscope may be needed) |
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| mixtures can be separated by _______ methods |
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| most substances are ______ |
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| 2+ atoms from 2+ elements is what |
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| compounds have a specific _______ and ______ |
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| composition and properties |
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| what cannot be decomposed into new substances |
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| objects can be seen, measured and handled without aids |
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| objects can be seen with a microscope |
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| matter consists of tiny particles in constant motion |
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| all matter is made up of extremely small atoms |
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| all atoms of a given element are chemically _______ |
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| atoms are not _______, _____ or ______ during a chemical reaction |
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Definition
| created, destroyed, or converted into other kinds of atoms |
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| more than how many elements are currently known? |
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| how many elements occur naturally on earth? |
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| name 4 properties of metals |
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Definition
solid (except Hg)
conduct electricity
ductile (draw into wires)
malleable (roll into sheets) |
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Term
| two or more different physical forms in which an element can exist |
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Definition
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| name three allotropes of carbon? |
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Definition
| .Graphite, charcoal, and diamond |
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| this shows the number and types of atoms in a molecule or relative ratio of the atoms in a compound |
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| how reactants convert into products |
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| 2 properties of nonmetals |
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Definition
occur in all states
do not conduct electricity |
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| what is the one and only nonmetal that conducts electricity |
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| exhibit metallic and nonmetallic properties |
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| what do metalloids look like? |
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| when it comes to electricity, metalloids are what |
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| semiconductors; do conduct electricity, but not as well as metals |
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| most _____ elements form molecules |
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| all compounds are ____ but not all _____ are compounds |
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| all compounds are ____ but not all _____ are compounds |
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| different forms of elements with the same T, P, and phase |
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