ATOMIC THEORY



Name: Period:Date The History of the Cosmos AstronomersA Cooperative Learning ActivityIn this jigsaw activity, each member of the team is responsible for a specific part of the activity. As “experts” you must be able to teach your part to your group. With that goal in mind, members of each base group leave and form expert teams by topic, e.g. Heliocentric Theory. In your expert teams you must master the material and decide how best to teach it to the members of your base group. Finally, as experts, you return to your base groups and take turns using your expertise to teach each other about your topic. The topics here are extremely important; they WILL show up on a group quiz. Do not take this assignment lightly, your classmates are depending on you. Be as detailed and clear as you can. The ActivityObjective: As a group, identify and the historical developments in our understanding of the Cosmos from ancient Greece through modern times.Time Frame: You have 2 days of class time to work on this. Break up into expert groups by topics. The scientists/ topics are:Eudoxus, Aristotle & EratosthenesPtolemyNicolaus Copernicus & Galileo Galilei Tycho Brahe & Johannes KeplerStephen HawkingBegin collecting information about your topic using the internet (at least 2 sources beyond Wikipedia). Cite sources. Make sure these resources are credible. Use the following questions and directives as a guideline for gathering information. Do not limit your information to just these questions.What time period does your scientist(s) cover?What did your Astronomer do or discover? How did he discover it? What tools did he use to discover it (if he used any)What was the feeling towards the astronomer’s discovery at the time?If needed, draw an illustration of the discovery or law.Take notes on the material you read.As an expert group, determine what information you feel is most important to teach to your individual base groups. Go over your questions above and the questions below that pertain to each model to the remainder of your group.At the end of the allotted time, return to your base group and use your expertise to teach the development of your model of the atom to your group members. In addition, with your group, construct a timeline of the events. In expert groups: answer only the following questions that apply to your topicEudoxus, Aristotle & EratosthenesHow did Eudoxus believe that the moon and stars were aligned?First Astronomer to attempt to predict eclipses. What did Aristotle do to Eudoxus’ model?Describe Erastosthenes major contribution to AstronomyDescribe how he managed to calculate the circumference of the Earth with minimal tools. How close was he with his prediction?PtolemyDescribe his Astronomical modelDescribe epicycles. Include a drawingWhat did Ptolemy use epicycles to describeNicolaus Copernicus & Galileo Galilei Describe Nicolaus Copernicus’ modelHow did this model change on Ptolemy’s model, what did this make about Ptolemy’s model unnecessary.What contribution did Galileo make to the telescopeWhat are Galileo’s major discoveries. Tycho Brahe & Johannes KeplerWhat did Brahe contribute to Astronomy?What types of things did he observe that directly assisted in his discoveries?What is Johannes Kepler contribute to AstronomyDescribe the contribution and draw an illustrationDescribe the relationship between Kepler and BraheStephen HawkingStephen Hawking is famous for many things, what is the discovery that made Stephen hawking famous?What cosmological principle about black holes is named after him, explain it and it’s consequences. What disease has he lived with for 50 years?Atomic TheoryThe History of the Atom - Student WorksheetDirections: each student in the group will answer the questions below in their own words and in complete sentences.How did Eudoxus believe that the moon and stars were aligned?Why was Aristotle considered correct over Democritus based on their time period?Explain the parts of Dalton’s Atomic Theory .What was significant about Dalton’s Atomic Theory as opposed to what Democritus or Aristotle supported.Which portions of Dalton’s Atomic Theory are still considered correct ?What are cathode rays ?Describe JJ Thomson’s Cathode Ray Experiment. Include a drawing of the cathode ray experiment .What particle did Thomson discover?Describe Thomson’s “Plum Pudding” model of the atom. Include a drawing.Describe Robert Millikan’s Oil Drop Experiment.What did Robert Millikan discover about the electron?Which subatomic particle did James Chadwick discover?Describe Ernest Rutherford’s Gold Foil Experiment. Include a drawing.Describe Rutherford’s model of the atom. Include a drawing.Describe Bohr’s model of the atom.Explain why Bohr’s model of the atoms is sometimes called the planetary model.Explain why electrons orbit around the nucleus. ................
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