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    Slide 1 Slide 1 Presentation Transcript

    • Probe Activity 3 Lander Student Sheet 6a Pluto: a planet no more The International Astronomical Union (IAU) has downgraded Pluto from being our ninth planet to the category dwarf planet. Many people are angry about this decision. Should Pluto be reinstated as a planet? Do the tasks to help you decide. Complete the report form. Look at the hints to help you write the report to the best grade you can. Task 1 Task 2 • Study the data cards about • Decide on three nine big objects in the Solar characteristics that a body System. must have in order to qualify Task 3 • Use the report form to record as a planet. • The IAU decided that to be a your findings as you work • Complete this section on the planet, a body must: through the following: report form. - Orbit the Sun - Arrange the objects in order - Have an orbit that is circular of size. • Does Pluto have these (or nearly) - Put them in order of characteristics? - Not cross the orbits of other discovery date. • Report your conclusions on the bodies. - Put them in order of distance report form. from the Sun. • Do you agree with the decision - Group them by orbital type. to reclassify Pluto as a dwarf - Group them by type of planet? object. • Report your conclusions on the report form.© Association for Science Education and Centre for Science Education 2011 This page may have been changed from the original
    • Probe Activity 3 Lander Student Sheet 6c Pluto Data cards Object: Mercury Object: Pluto Object: Ceres Time to orbit Sun: 88 days Time to orbit Sun: 250 years Time to orbit Sun: 4.6 years When discovered: 2000 BCE When discovered: 1930 When discovered: 1801 Diameter/km: 4800 Diameter/km: 2200 Diameter/km: 1000 Distance from Sun/AU: 0.4 Distance from Sun/AU: 40 Distance from Sun/AU: 2-3 (in the Orbit and notes: Orbit nearly circular. Orbit and notes: Orbit inclined to the asteroid belt between Mars and Has cleared its orbit of other objects. orbits of other planets. Elliptical (30-50 Jupiter) Classification: Planet AU). Crosses orbit of Neptune. Orbit and notes: Does not have a Classification: Dwarf Planet clear orbit. Was the largest asteroid. Classification: Dwarf Planet Object: Charon Object: Eris Object: Sedna Time to orbit Sun: 250 years (with Time to orbit Sun: 560 years Time to orbit Sun: 10,500 years Pluto) When discovered: 2003 When discovered: 2004 When discovered: 1978 Diameter/km: 3000 Diameter/km: 1800 Diameter/km: 1200 Distance from Sun/AU: 67 Distance from Sun/AU: 90 at closest Distance from Sun/AU: 40 Orbit and notes: Elliptical (40-100 Orbit and notes: Very very elliptical. Orbit and notes: Orbits as a moon of AU). Crosses orbits of Neptune and Crosses orbits of small solar system Pluto. Very big – almost Pluto’s ‘twin’. Pluto. Was called Xena. bodies. Classification: Moon of Dwarf Planet Classification: Dwarf Planet Classification: Dwarf Planet (Pluto) Object: Europa Object: Mars Object: Io Time to orbit Sun: 11.8 years (with Time to orbit Sun: 1.9 years Time to orbit Sun: 11.8 years (with Jupiter) When discovered: when humans first Jupiter) When discovered: 1610 looked at stars When discovered: 1610 Diameter/km: 3100 Diameter/km: 6800 Diameter/km: 3600 Distance from Sun/AU: 5.0 Distance from Sun/AU: 1.5 Distance from Sun/AU: 5.0 Orbit and notes: Orbits as a moon of Orbit and notes: Orbit nearly circular. Orbit and notes: Orbits as a moon of Jupiter Has cleared its orbit of other objects. Jupiter Classification: Moon of Planet Classification: Planet Classification: Moon of Planet (Jupiter) (Jupiter)© Association for Science Education and Centre for Science Education 2011 This page may have been changed from the original
    • Probe Activity 3 Lander Student Sheet 6b Pluto report Form Task 1 The patterns I can see are… Comparison (using data cards) Planets Dwarf planets I think astronomers will not discover more dwarf planets because… Task 2 To be a planet, a body must have… Does Pluto have this? 1 2 3 Task 3 My personal comments on the action of the IAU to reclassify Pluto…© Association for Science Education and Centre for Science Education 2011 This page may have been changed from the original
    • Probe Activity 3 Lander Student Sheet 6d Pluto assessment guidelines Pluto assessment guidelines To be graded level 4, 5 or 6 you need to To be graded level 4, 5 or 6 you need to 4: To get level 4, you need to… 4: To get level 4, you need to… …describe patterns in Solar System objects. …describe patterns in Solar System objects. …start to make conclusions based on patterns …start to make conclusions based on patterns in the data. in the data. 5: Do everything for level 4 plus… 5: Do everything for level 4 plus… …make conclusions that agree with the …make conclusions that agree with the evidence. evidence. 6: Do everything for level 5 plus… 6: Do everything for level 5 plus… …use more than one science idea to …use more than one science idea to explain the conclusions. explain the conclusions. …explain why some evidence does not fit …explain why some evidence does not fit with the conclusions. with the conclusions. 7: Do everything for level 6 plus… 7: Do everything for level 6 plus… …identify limitations in the data. …identify limitations in the data. …decide whether there is enough data to …decide whether there is enough data to properly support your conclusions. properly support your conclusions. …explain how evidence supports the idea …explain how evidence supports the idea that Pluto is not a planet. that Pluto is not a planet.© Association for Science Education and Centre for Science Education 2011 This page may have been changed from the original