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8th Grade Science-UddoName: ___________________________________________Math in science notesDate: _______________________ Class Period: __________The Metric SystemThe two systems of measurement used in the world are ________________________ and _____________________The US uses the _____________________ systemMost other countries use the _____________________ systemThe metric system is based on powers of ______________English Units of Measure (and what they measure)Metric Units of Measure (and what they measure)In science we only use the ______________________ system of measurement to collect dataExamples of units of measure in the metric system:Length -- ______________, centimeters, kilometers, the base unit is the meterMass- ____________, milligrams, the base unit is the gramVolume – liter, _______________ the base unit is the literConverting with in the metric systemWhen moving from one unit to a ___________ unit99250548260When moving from one unit to a ___________ unit10668002540There is an easier way to convert in the metric system!!!You just have to remember this mnemonic device and fill in the stair steps…. King Henry Died base unit Drinking Chocolate MilkIn Class Practice4 km = ________ m 2.) 2000 mg = ___________ g 3.) 104 km = ____________ m 480 cm = ____________ m 5.) 5.6 kg = _____________ g 6.) 8 mm = ___________ cm5 L = ___________ mL 8.) 198 g = ___________ kg 9.) 75 mL = ___________ L50 cm = ___________ m 11.) 5.6 m = ___________ cm12.) 16 cm = ___________ mm2500 m = ___________ km14.) 65 g = ___________ mg15.) 6.3 cm ___________ mm120 mg = ___________g Compare using >, < or =63 cm _____________ 6 m18.) 536 cm _____________ 53.6 dm19.) 5 g _____________ 508 mg43 mg _____________5 g20.) 1500 mL _____________ 1.5 L21.) 3.6 m _____________ 36 cmGraphs and GraphingFirst let’s review…. DesignExperiments are made up of two groups:Control Group - ____________________________________________________________________________________Experimental Group - _______________________________________________________________________________VariablesIndependent Variable- ____________________________________________________________________________Dependent Variable - _______________________________________________________________________________A little practice--Identify the independent variable and dependent variable in each scenario.Does adding dimples to a car increase its gas mileage?Independent variable ________________________________Dependent variable _________________________________Control Group ______________________________________Are elephants afraid of mice? Independent variable ________________________________Dependent variable _________________________________Control Group ______________________________________Can a rock thrown in a lawn mower have the same force as a bullet shot from a gun?Independent variable ________________________________Dependent variable _________________________________Control Group ______________________________________Is it worth running in the rain?Independent variable ________________________________Dependent variable _________________________________Control Group ______________________________________Types of graphsLine graph - ____________________________________________________________________________________Bar graph - ____________________________________________________________________________________Scatter plot - ___________________________________________________________________________________Circle graph - _____________________________________________________________________________________550841311456838404801257301898650-1270-15367034925Parts of the graphWhen creating graphs in science make sure to follow the _____________________ checklist Scale- graph should take up ______________ page (>80%), each line is worth the ______________ value, the numbers are _____________ spaced; allows us to see the _________________ in data easilyHow to find the proper scale (for most cases)Count the number of ______________ on each axis and jot that number down somewhere.Divide the range (range is _________________ between the highest value and the lowest value for that data set) by the number of boxes on that axis. If the number is a decimal you will always _____________ ______ to the next whole number. You have to round up to keep your graph inside your axes, if you do not your data will go off of the page. This number will be your scale for that particular axis. **This step also has to be followed for each separate ________________.Scale = Range / Number of Boxes495490553975Units- what the ________________ on the scale are measuring, (m), (s), (oC)Labels- Describes what is being __________________; length, time, temperatureLabeled Axis (title AND units)X axis = ____________________ variableY axis = ____________________ variableRemember DRY MIXD- ______________________R - ______________________Y - ______________________M - _____________________I - ______________________X - ______________________Title- Placed across the top of the graph, short ____________________ of what the graph shows; DO NOT simply restate the _______________________ and _______________ variables; ie. Number of waves vs. TimeAccuracy - data is plotted precisely, _______________ included if necessaryNeatness – lines drawn with a ________________, easy to readLine GraphsUsed to show a ______________________ _________________ ___________________Shows how the dependent variable is related to or changes due to the independent variableLine Graph RelationshipsDescriptions of how two variables __________________ to each otherDirect Relationship – BOTH variables ______________ or BOTH variables ____________________________________ – Pattern on graph repeats over timeStatic – As the independent variable _________________, the dependent variable _____________ _____ _____________________________ Relationship – When one variable increases, the other decreasesLabel the graphs below with the relationships from above25908093345Determine which graph relationship (Direct, Indirect, Cyclic, Static) would illustrate the following dataFrequency of ocean tides _____________________As temperature increases, density decreases _____________________Seasonal Temperatures _____________________As mineral size increases, density stays the same _____________________Plants grow more with more sunlight_____________________Let’s Practice making a line graph….make sure to check SULTAN so that ALL required parts are includedThe data table shows the average level of atmospheric carbon dioxide (CO2), measured in parts per million (ppm), for the month of February at the Mauna Loa observatory in Hawaii from 2008 to 2014.Create a graph that correctly represents this data390715572390DON’T FORGET SULTAN70675582550What type of relationship is shown on the graph? ____________________________________________________________________________________________What is the dependent variable? ______________________________________________34880557620Bar GraphsUsed to _____________ things, good for _______________________If there is data for multiple groups, bars can be side by side or _______________If there are multiple bars for a category a _______________ is necessaryLet’s Practice making a bar graph….make sure to check SULTAN so that ALL required parts are includedThe table below shows information about five large object in the Kuiper Belt. The Kuiper Belt is located approximately 30-100 astronomical units (AU) from the Sun. An astronomical unit is the average distance between the Earth and the Sun, 149.6 million kilometers.3754755306705Create a graph of the equatorial diameter of each of the Kuiper Belt objects listed in the table. The diameter of Earth’s moon has been graphed for comparison.2400301244604191000-116205Scatter PlotUsed to determine if there is a ________________ or relationship between two variables___________ Correlation- as one variable increases so does the otherNegative Correlation- as one variablegoes ________, the other goes ______________No correlation- no apparent __________________ between the variablesLet’s Practice making a scatter plot….make sure to check SULTAN so that ALL required parts are includedAssume that during a three-hour period spent outside, a person recorded the temperature and their water consumption. The experiment was conducted on 9 randomly selected dates during the summer. The data shown is shown in the table below. DayTemperature (oF)Water Consumption (oz)199482852739748475165923268525783208924098323Circle one:This graph shows a Positive / Negative/ No correlationbetween the dataCircle Graphs3918797201083Used to show parts of a whole – look for _________________Good for showing the _______________ of somethingAlways include a ________________Your _________ should be the value assigned to each sliceLet’s Practice making a pie graph….make sure to check SULTAN so that ALL required parts are includedSnow Ridge Ski AreaBeginner50%Intermediate25%Advanced15%Expert Only10%Make a pie chart to display the percentage of runs at Snow Ridge Ski Area. Some dashed lines have been placed in the chart to help you be as accurate as possiblekey4011930131445Mass, Volume and DensityMassThe amount of ______________ in something6555105208280Units = ________________4459605105410Tool used to measure = _______________VolumeThe amount of ______________ something takes up Units = ________________ or ________________Tool used to measure = _______________ or ______________ _______________Two methods for finding volume:Regular object (regular object = _____________sides)Use a ruler or meter stick and measure ____________, width and ______________Formula = _________________________________________ cm x cm x cm = cm3 we measured ________________ dimensions so units are ___________________________________________ object (for example a mineral or rock)_________________ __________________– use a graduated cylinderFill _________________ ______________ with water, leave room at the top, note the amount of waterPut object in graduated cylinder, note new water level__________________ value in #1 from value in #2Your answer for #3 is the volume with ________________ as the unitsDensityThe amount of _________________ in a specific ___________________Can be used to help identify an ____________________ substanceUnits = __________________or ______________________Tools used to measure = ________________, and ______________ or ________________ _____________________Density of water is _________________ or _____________________If an object is placed in water and _____________, its density is ________________ than 1 g/cm3If an object is placed in water and it _________________, its density is ___________________ than 1 g/cm3468630131445Let’s do some examples—for credit you mustWrite the formulaShow all workRound to the nearest hundreth’s placeInclude proper unitsWhat is the density of an object with a mass of 120 g and a volume of 7 mL?What is the volume of an object with 220 grams and a density of 55 g/cm3?A block of wood has a mass of 180 grams. It is 10.0 long, 6.0 cm wide, and 4.0 cm thick. What is its volume and density?Mass = 34.1 gVolume = 78.5 mLDensity = ?Mass = 27 gDensity = 0.76 g/cm3Volume = ?Volume = 25 mLDensity = 2.5 g/mLMass = ?Review--Measurement TablePropertyToolUnitsFormulaMassVolume (regular object)Volume (irregular object)No formula but what is the method?DensityLength ................
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