Thursday 12/1/2016

Science Log 7  Thursday December 1: If a scaling factor was 1 in=.15 cm, how tall would you be? Could you fit in a piece of notebook paper? Show your work.

10. Quick draw Make sure your 7.1 focus question is answered Make sure you include objects that are within the solar system, such as planets, moons, comets, asteroids, meteors, Oort cloud and the Sun Do not include objects and systems that are beyond the limits of the solar system, such as, stars (except the Sun), galaxies, nebulae, black holes, and constellations.

18. Vocab 7.2 Notes: (find where you have this info and highlight it somehow) The cosmos can be categorized into our local neighborhood (solar system), our larger local area (galaxy), and everything beyond (universe) The astronomical unit (AU) is used to measure the distance of relatively close objects in space, such as those within the solar system. Light-year (ly) is a unit that indicates a much greater distance, such as objects outside the solar system. The solar system formed from a cloud of dust (nebula) that accreted into various objects organized around the Sun. 1 ly to 100,000 ly is part of the Milky Way > 100,000 ly is part of the universe

Purpose The distance between solar system objects is enormous. Liquid water is essential for life as we know it. The temperature on a planet depends on two major variables; distance from the Sun and the nature of the planet’s mediating atmosphere. Images can convey information about the presence and history of liquid water on planetary surfaces.

In this Earth/Moon model, how big is the Sun and where should it be? 1. Review scale models The Earth model is 12 cm Moon is 3.5 cm sphere Earth is 30 Earth diameters away or about 360 cm In this Earth/Moon model, how big is the Sun and where should it be? What information do you need to answer this question?

In this Earth/Moon model, how big is the Sun and where should it be? 1. Review scale models The Earth model is 12 cm Moon is 3.5 cm sphere Earth is 30 Earth diameters away or about 360 cm In this Earth/Moon model, how big is the Sun and where should it be? Really big and very long distance away What information do you need to answer this question?

In this Earth/Moon model, how big is the Sun and where should it be? 1. Review scale models The Earth model is 12 cm Moon is 3.5 cm sphere Earth is 30 Earth diameters away or about 360 cm In this Earth/Moon model, how big is the Sun and where should it be? Really big and very long distance away What information do you need to answer this question?

1. Review scale models The Earth model is 12 cm Moon is 3.5 cm sphere Earth is 30 Earth diameters away or about 360 cm In this Earth/Moon model, how big is the Sun and where should it be? Really big and very long distance away What information do you need to answer this question? Scale of the model, diameter of the Sun, distance between Earth and the Sun.

1. Review scale models Look in your table of contents for when we did scaling Look for The diameter of the Sun Distance to Earth Scale of model Scaled diameter Scaled distance

1. Review scale models Look in your table of contents for when we did scaling Look for The diameter of the Sun: 1,390,000 km Distance to Earth Scale of model Scaled diameter Scaled distance

1. Review scale models Look in your table of contents for when we did scaling Look for The diameter of the Sun: 1,390,000 km Distance to Earth: Scale of model Scaled diameter Scaled distance

1. Review scale models Look in your table of contents for when we did scaling Look for The diameter of the Sun: 1,390,000 km Distance to Earth: 150,000,000 km Scale of model Scaled diameter Scaled distance

1. Review scale models Look in your table of contents for when we did scaling Look for The diameter of the Sun: 1,390,000 km Distance to Earth: 150,000,000 km Scale of model Scaled diameter Scaled distance

1. Review scale models Look in your table of contents for when we did scaling Look for The diameter of the Sun: 1,390,000 km Distance to Earth: 150,000,000 km Scale of model: 1 cm = 1063 km Scaled diameter Scaled distance

1. Review scale models Look in your table of contents for when we did scaling Look for The diameter of the Sun: 1,390,000 km Distance to Earth: 150,000,000 km Scale of model: 1 cm = 1063 km Scaled diameter Scaled distance

1. Review scale models Look in your table of contents for when we did scaling Look for The diameter of the Sun: 1,390,000 km Distance to Earth: 150,000,000 km Scale of model: 1 cm = 1063 km Scaled diameter 1,390,000 km /1063cm = 1308 cm about 13m Scaled distance

1. Review scale models Look in your table of contents for when we did scaling Look for The diameter of the Sun: 1,390,000 km Distance to Earth: 150,000,000 km Scale of model: 1 cm = 1063 km Scaled diameter 1,390,000 km /cm = 1308 cm about 13m Scaled distance

1. Review scale models Look in your table of contents for when we did scaling Look for The diameter of the Sun: 1,390,000 km Distance to Earth: 150,000,000 km Scale of model: 1 cm = 1063 km Scaled diameter 1,390,000 km /cm = 1308 cm about 13m Scaled distance 150,000,000 km / 1063 km/cm = 141,110 cm about 1.4 km

Notes 8.1 page 86 Earth/Moon scale model Actual for the Sun: Diameter of the Sun: 1,390,000 km (radius = 695,000 km) Distance to Earth: 150,000,000 km Model for the Sun: Scaling factor 1 cm = 1063 km Diameter of the Sun: 1,390,000 km/1063 km = 1308 cm or 13.08 m Distance to the Earth: 150,000,000 km/1063 km = 14,110 cm or 1.4 km

The Sun The Sun scaled to this 12 cm model Earth would be about 14 m across, or about the size of the classroom. It would be positioned about 1.4 km away from this Earth model. Where would Earth be if this classroom were the Sun? Google Earth

Focus Question 8.1 Another Sun model to model the solar system where the scaling factor is 1 cm = 1 million kilometers. This model Sun is about 1.4 cm in diameter. Focus Question 8.1 Where are the planets in the solar system?

4. Resources Answering the focus question is a two- phase task. Calculate the scaled size and orbit radius for each planet. Construct the model solar system by placing the scaled planets along a length of string.

5. Refine the model making process NBS 41, Scale Model 1 of the Solar System Transcribe each planet’s name and radius, using data from “Sun, Planets, and Satellites in the Solar System” in your books. Calculate the planet’s diameter by multiplying the radius by 2 Record the distance from the Sun, convert it from the unit “thousands of km” in the book to “km” on the table. Calculate the scaled diameter and distance by using the scaling factor.

6. Calculate Diameter and distance 1 dime = 1 Sun 1 dime = 1,390,000 km, which is about 1,400,000 km So 1.4 cm = 1,400,000 km 1 cm = 1,400,000 km/ 1.4 = 1,000,000 km The scale for Model 1 1 cm = 1,000,000 km The scaling factor is 1,000,000 km To scale a planet diameter in centimeters, divide the planet diameter by the scaling factor 1,000,000.

10. Summarize the activity What could we do to make the whole solar system model fit in the room?

10. Summarize the activity What could we do to make the whole solar system model fit in the room? Make it smaller, such as 1 mm = 1 million kilometers. However, that would make it impossible to see or even represent the inner planets.