Chemisrty
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| Chemistry | The study of the composition of a substance and the changes they undergo.
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| Distinguish between physical and chemical properties of matter. | Physical properties: it can be observed with out changing the substance. Chemical properties: how matter reacts with other matter.
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| copper sulfate is a bright blue substance | physical
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| mercury is a liquid at 20 degrees C | physical
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| Methane (natural gas) is flammable | chemical
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| iron reacts with oxygen gas to form iron oxide | chemical
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| Distinguish between physical and chemical changes in matter | PC: alters a substance without changing composition.
CC: alters a substance while changing it
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| water is a puddle evaporates on a sunny day | physical
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| a coffee cup shatters when it falls and hits the floor | physical
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| wood is burned in a camp fire | chemical
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| gasoline burns in a car engine | chemical
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| List 3 common states of matter | solid,liquid, gas
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| Describe location and motion of particles in each | Solid: vibrate in place and tightly packed.
Liquid: close together, moving and can't move past each other.
Gas: moving fast and far apart.
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| Name the two types of pure substances | element and compund
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| Distinguish between elements and compunds | Elements: made of only one atom. Compounds: made of one or more atoms.
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| element or compound: Water (H20) | compund
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| element or compound: Ozone (O3) | compound
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| element or compound: Helium gas (He) | element
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| Distinguish between pure substance and mixtures | M: consists of a physical blend of two or more substances.
PS: can be described by one chemical formula
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| PS or mixture: orange soda | mixture
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| PS or mixture:chocolate chip cookie | mixture
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| PS or mixture: calcium | pure substance
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| PS or mixture: sodium chloride | pure subastance
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| Homo or Hetero mixture: milk | hetero
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| Homo or Hetero mixture: clean air | homo
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| Homo or Hetero mixture: sugar-water | homo
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| Homo or Hetero mixture: muddy water | hetero
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| Distinguish between heterogeneous and homogeneous mixtures | Homo: completely uniform composition
Hetero: not uniform compostion
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| Na | sodium
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| K | potassium
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| Br | bromine
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| P | phosphorous
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| He | helium
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| Si | silicon
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| Compare and contrast pure research and applied research | PR: acquiring knowledge for the sake of knowing it.
AR: used to solve real world problems.
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| Purpose of the scientific method: | The scientific method is an approach to the solution of scientific problems.
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| Steps of scientific method | 1. Observe.
2. Research.
3. Hypothesis.
4. Experiment.
5. Analyze data.
6. Develop theory.
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| Distinguish between scientific laws and scientific theories | SL: a concise statement that's summerizes the results of a broad spectrum of observations and experiments.
ST: a thoroghly tested explanation of why experiments give certain results.
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| CH4(g)+2O2(g)-> CO2(g)+2H2O(g) what are the reactants and products of this equation? | R:CH4(g)and 2O2(g)
P: CO2(g) and 2H2O(g)
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| Law of Conservation of Mass: | The atoms you start with are still there at the end.
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| Solution: | A homogeneous mixture
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| Solution, suspention, or colloid: Muddy water | suspension
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| Solution, suspention, or colloid: a cola soft drink | solution
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| Solution, suspention, or colloid: mayonnaise | colloid
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| Solution, suspention, or colloid: italian dressing | suspension
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| Solution, suspention, or colloid: sea water | solution
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| Solution, suspention, or colloid:a medicine accompanied by instructions to "shake before use" | suspension
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| Cl | chlorine
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| F | fluorine
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| Cu | copper
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| Iodine | I
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