7th science
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Matter | anything that has mass and takes up space; solid liquid gas measured by volume, mass
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| solid molecules | molecules can't take shape of container, tightly packed, vibrate in place pumpkin
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| liquid molecules | molecules take shape of container, spreadout a little bit, able to flow water
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| gas molecules | molecules take place of container, spread out, able to flow very freely water vapor
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| Law of Conservation of Matter | states that matter isn't created or destroyed only changes form measure the amss of everything inculded in the chemical process before and after
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| Proof of Law of Conservation of Matter | mass of un shapened pencil 6 grams according to the Law of Conservation of Matter the pencil shavings and the sharpened pencil should be 6 grams mass of sharpened pencil, pencil shavings and broken piece of lead from pencil is 6 grams
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| Atoms | basic building blocks of matter measured by the mass protons, neutrons, electrons
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| Protons | positively charged found in the nucleus with neutrons
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| Neutrons | no charged found in the nucleus with protons
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| Electrons | negatively charged found orbiting the nucleus
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| Substances | matter that has the same composition and properties throughout measure the mass of the object before and after the experiment
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| Element | mattewr that is made up of only one kind of atom that can't be broken down into simplier parts measured by atomic mass oxygen
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| Compound | substance that contains 2 or more elements chemically bonded together to create a new substance also known as a solution measured by the numver of elements and weither the elements are chemically bonded or not water
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| Mixture | made up of 2 or more substances (elements or compounds) that come together but don't combine to make a new substances measured by the number of elements and weither the elements aren't mixed air
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| Homogeneous Mixture | contains 2 or more substances that are evenly mixed on a molecular level but still aren't bonded together measured by seeing if the substances are equal in volume, mass, number, ect. coffee
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| Heterogenus Mixture | type of mixture where the substances aren't evenly mixed measured by seeing if the substances are equal in volume, mass, number, etc. cold cereal with milk
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| Physical Property | outwardly observable characteristics of matter
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| Chemical Property | How matter changes into other (new) matter
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| Physical Changes | changes that don't change the composition of a substance
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| Chemical changes | results in the change of the compostion of a substance
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| Sub-atomic particles | atoms are made up of them
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| periodic table | a chart of the elements to help to organize and display the elements
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| Atomic number | number of protons (p+'s) in the nucleus
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| Atomic Mass (mass number) | number of protons (p+) and neutrons (n0) in the nucleus
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| Metal | shiny or metallic luster and are good conductors of heat and electrity; most soild at room temperature; found on left side of periodic table
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| Non-metal | elements that are usually dull in appearance; poor conductors of heat or electrity; found on right side of periodic table
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| Physical properties of solid | can hold it, when heated become liquid, holds it shape, has definite volume, can't pass into another solid, when cooled stays solid
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| Physical properties of liquid | can't hold it, when heated becomes a gas, doesn't hold its shape, has definite volume, substances can go throught it, when cooled becomes a solid
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| Physical properties | color, odor, shape, texture, mass, wieght, volume, density, melting and boiling point, malleablity
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| Chemical properties | flammability, reactivity, rust, tarnis, burn, etc.
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| Physical changes | change in the state of matter, change in size or shape
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| Chemcial changes | color change, temperature change, formation of a gas, formation of a perceptible it is possible to have a color, temperture change and the formation of a gas without a chemical change
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| How are the elements arranged on the periodic table? | The elements are arranged by increasing the atomic #, by metal, non-metal, and mettalloid, by property
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| atomic # | protons
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| atomic mass | protons+neutrons in nucleus
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| protons | electrons
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| chemical reactions | a process that porduces chemcial change
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| Reactants | the substance that exists before the reaction begins
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| Product | the substance that form as a result of the reaction
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| Chemical Equations | tells chemcists at a glance the reactants, products, physical states, and the proportions of each substance present
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| Photosynthesis chemical reaction | CO2+H2O(reactants) produces(energy)C6H12O6+O2+H2O (products)
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| Cellular REspiration chemcial reaction | C6H12O6+O2+H2O (reactants) produces(energy) CO2+H2O(products)
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| 3 physical changes | cutting grass, teating paper, dissolving water
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| 3 chemical changes | rottening bananas, rusting car, burning match
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| copper penny turning dark | chemical change
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| wind erosion of rocks | physical change
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| Chemical formula | tlls you what elements it is made up of and how many atoms of that elements
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| Subscript | tells the number of atoms of that element
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| Chemical equation for NaHCO3 | 1 sodium atom, 1 hydrogen atom, 1 carbon atom and 3 oxygen atoms
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| Chemcial equation for C6H12O6 | 6 carbon atoms, 12 hydrogen atom, and 6 oxygen atoms
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| Acids | substances that release positively charged hydrogen ions into water
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| Bases | substances that accept hydrogen ions
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| physical properties of acids | sour taste, reaction with some metals, reaction with bases to form a neutral pH (7), has a pH range less than 7, the lower the pH, the more a acidic the solution (pH of 1 is more acidic than a pH of 6
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| physical properties of bases | fell slippery, taste bitter, cause burns, can damage tissues, in cleaning products, reaction with acids to form a neutral pH solution (7), a pH greater than 7, higher the pH, the more basic the solution (pH of 14 is more basic than a pH of 8)
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| Some examples for acids | hydrochloric acid-0, soft drinks-1 to 4, gastric contents-2 to 3, milk-6 to 7
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| Some examples for bases | egg whites-7 to 9, baking soda-8, sodium hydroxide-14
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Created by:
kmm0602
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