www.njctl.org. 6th Grade PSI. Earth and the Solar System. Solar System – Revolution Webquest. 6th Grade PSI Science. Name ... listed. 1. Go to: http:/...
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Solar System – Revolution Webquest 6th Grade PSI Science
Name _________________________
Follow the steps below exactly in order to complete this lab! There will be questions throughout the activity so make sure that you are following along with the procedure listed. 1. Go to: http://www.google.com and search for “My Solar System 2.03” Click on the following link:
2. Click “Start” to begin the simulation. 3. Move the slider all the way to the left accurate: 4. Click “Show Tape Measure” and “Show Grid.” 5. Click the button for 4 objects
6. Click “Start” to begin the simulation and let it run until the purple planet (body 2) has made one complete orbit (one year). 7. After the first orbit (year), turn off the traces (Click “Show Traces”) and watch another orbit (year) of the purple planet (body 2). Question One: Is the blue moon (body 3) circling the yellow sun (body 1) or the purple planet (body 2)? Explain your answer. ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________
www.njctl.org
6th Grade PSI
Earth and the Solar System
8. Increase the mass of the sun (body 1) to 400 and allow the simulation to run for one complete orbit of the purple planet (body 2).
9. Decrease the mass of the sun (body 1) to 175 and allow the simulation to run for one complete orbit of the purple planet (body 2). (~25 seconds)
Question Two: How do the orbits of the planets change when the mass of the sun is increased or decreased? Why? Explain your answer. ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ Question Three: Why does the sun (body 1) follow a circular path? How does the path change as its mass changes? Why? Explain your answer. ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ 10. Choose the preset for Sun and Planet from the pull-down menu.
www.njctl.org
6th Grade PSI
Earth and the Solar System
11. Complete the data table on the following page by changing the mass as shown and recording the length of the year in seconds, and also measuring the distance from the planet to the sun at the closest point (perihelion) and farthest point (aphelion). (Make sure slider is set to most accurate)
Adjust the boxes under “mass” to the right based on the numbers in the data table.
The ruler is shown to the right. The crosshairs with the yellow circle should be placed on the Sun before hitting “Start.” The red cross on the right can be pulled to make it longer/shorter. The distance is shown underneath.
How to Measure: Start with the one side of the ruler on the Sun. Allow the simulation to run, and you should see an image similar to the one on the right. Take the end of the ruler that is not on the Sun and measure to the right, left, up, and down. Below, write the closest distance (smallest number) and furthest distance.
www.njctl.org
6th Grade PSI
Earth and the Solar System
Mass of Sun
Mass of Planet
Time of One
Closest
Farthest
(body 1)
(body 2)
Orbit
Distance to
Distance to
(planetary
Sun
Sun (aphelion)
year)
(perihelion)
200
10
400
10
600
10
800
10
1000
10
150
10
200
1
200
20
200
50
200
100
200
200
Question Four: When is the planet moving fastest? Why? ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________
www.njctl.org
6th Grade PSI
Earth and the Solar System
Question Five: What makes the length of the year increase and decrease? Why? ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ Question Six: A planet in a circular orbit would always be the same distance from the sun. What do you notice about orbits with the shortest years? Why? ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________
12. Choose the ellipses preset from the pull-down menu:
13. Run the simulation until the green planet (body 4) returns to its starting point (one planetary year) and complete the table on the next page.
www.njctl.org
6th Grade PSI
Earth and the Solar System
Planet
Time of One Orbit
Closest Distance
Farthest Distance
(planetary year)
to Sun (perihelion)
to Sun (aphelion)
Purple Planet (body 2) Blue Planet (body 3) Green Planet (body 4)
14. Change the y velocity of the blue planet (body 3) to 90 and the green planet (body 4) to 70.
15. Run the simulation again until the green planet (body 4) returns to its starting point (one planetary year) and fill in the table below: Planet
Time of One Orbit
Closest Distance
Farthest Distance
(planetary year)
to Sun (perihelion)
to Sun (aphelion)
Purple Planet (body 2) Blue Planet (body 3) Green Planet
estimate
(body 4)
www.njctl.org
6th Grade PSI
Earth and the Solar System
Question Seven: How does the year of a planet closer to the sun compare with one that is farther away? Why? ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ Question Eight: How can an orbit be made more circular? Explain your answer. ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ Question Nine: In your own words describe what an orbit is and what factors affect the size, speed and time (period) of an orbit. ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________
