1 essential questions 1. what is the solar system? 2. how are models and scale related? 3. can we...
TRANSCRIPT
1
Essential Questions
1. What is the solar system?
2. How are models and scale related?
3. Can we make a solar system model that uses the same scale for diameter and distance?
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At the center of the solar system is
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What else is in our solar system?
• Planets• Dwarf planets• Moons• Asteroids• Comets• Meteors
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Definitions of Planet and Dwarf Planet
Characteristic Planet Dwarf Planet
Is in orbit around the Sun X X
Has sufficient mass to be nearly round X X
Is not a satellite X X
Has cleared the neighborhood around its orbit X
Has NOT cleared the neighborhood around its orbit
X
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Five Current Dwarf Planets
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Planets in order from the Sun
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Models and Scales
Model Name Model Scale
Rocket 1 inch = 36 feet
Quadrangle Map 1 inch = 2,000 feet
Globe 1 inch = 660 miles
Solar System 1 inch = 100,000 miles
Measured distance x Scale = Real distance
Length of Rocket: 10 inches x 36 feet/inch = 360 feet
Distance on globe from South Carolina to southern California 4 inches x 660 miles/inch = 2,640 miles
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Modeling the Solar System
1. Order the major objects in solar system by size
2. Use balls in the scale of 1 inch = 100,000 miles
3. Put balls the proper distances apart• Count paces or steps instead of inches• If a pace = a yard, how many inches is that?• Using our scale, how many miles does a pace equal?
1 step = 36 inches x 100,000 miles/inch = 3,600,000 miles!
The biggest steps you’ll ever take!
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Planet Chart
Planet or Dwarf Planet
Paces from previous planet
Paces from Sun
Miles from Sun
Diameter in miles
Model diameter in inches
Mercury 3,000
Venus 7,500
Earth 7,900
Mars 4,200
Jupiter 89,400
Saturn 74,800
Uranus 31,800
Neptune 30,800
Pluto 1,400
Scale for Diameter and Distance: 1 in. = 100,000 mi.1 pace = 1 yard = 3,600,000 mi.
Using this scale, Sun is 8.5 inches in diameter
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199
267
4014
13595
247112
496249
777281
1019242
36,000,000
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Light Time
Light travels about 186,000 mi. or 300,000 km. per sec.
A "light-year" is the distance light travels in a year, and similarly, we can call the distance light travels in a second a "light second," etc.
Light Time
Model Distance
Actual Distance (average)
Moon to Earth 1.3 sec. 2.4 in. 240,000 mi.
Sun to Earth 8 min. 26 yd. 93,000,000 mi.
Sun to Saturn 80 min. 247 yd. 890,000,000 mi.
Sun to Pluto 5.5 hr. 1019 yd. 4,000,000,000 mi.
Sun to Proxima Centauri
4.2 yr. 4000 mi. 26,000,000,000,000 mi.
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Planet Chart
Planet or Dwarf Planet
Paces from previous planet
Paces from Sun
Miles from Sun
Diameter in miles
Model diameter in inches
Mercury 10 36,000,000 3,000
Venus 9 19 7,500
Earth 7 26 7,900
Mars 14 40 4,200
Jupiter 95 135 89,400
Saturn 112 247 74,800
Uranus 249 496 31,800
Neptune 281 777 30,800
Pluto 242 1019 1,400
Scale for Diameter and Distance: 1 in. = 100,000 mi.1 pace = 1 yard = 3,600,000 mi.
Using this scale, Sun is 8.5 inches in diameter
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Planet Chart (if creating model in smaller space)
Planet or Dwarf Planet
Paces from previous planet
Paces from Sun
Miles from Sun
Diameter in miles
Model diameter in inches
Mercury 1 3,000
Venus 32 in 1 + 32 in 7,500
Earth 29 in 2 + 25 in 7,900
Mars 1 + 14 in 4 4,200
Jupiter 9.5 13.5 89,400
Saturn 11.5 25 74,800
Uranus 25 50 31,800
Neptune 28 78 30,800
Pluto 25 103 1,400
Scale for Diameter: 1 in. = 100,000 mi.Scale for Distance: 1 in. = 1,000,000 mi.
1 pace = 1 yard = 36,000,000 mi.
Using this scale, Sun is 8.5 inches in diameter