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Ch. 20 Solar System

Formation of the Solar System

Planetary Orbits are shaped like what? ellipses
This ordinary term is correctly defined as 'what is the average kinetic energy of particles in an object?' temperature
These imperfections on the sun's surface, discovered by Galileo are called what? Sunspots
Light takes how long to travel from the sun to Earth? 8.3 light minutes
The visible layer of the sun? Photosphere
To find a planet's 'period of revolution' you must know it's? orbit
Which of Kepler's laws gets credit for 'gravitational assist?' Kepler's 2nd Law
How long does a sunspot cycle usually take? 11 years
Path of a body around another body is called a what? orbit
Giant eruptions on the Sun's surface are what? Solar Flares
The resistance of an objects speed or direction until acted upon by another body is call what? inertia
Where does nuclear fusion occur? Core of the sun.
A nebula collapses because of what force? Gravity
Very thick, dense and light takes up to a million years to escape. Radiative Zone
This layer can only be seen during a total solar eclipse, what is it? chromosphere
Hot gasses rise, cool down, heat up and rise, cool down and sink, this occurs in what layer of the sun? Convective Zone
After the nebula collapses, and the center gets hotter, pressure increases and forces begin working, what is formed? Sun
The outer atmosphere of the sun is called what? corona
Planets which are very large and formed of gas, with possible solid cores are what type of planet? Outer Planet
One complete trip of a body around another body is called what? revolution or period of revolution
Spin of a body on it's axis is called a what? rotation
Planets which are small, solid and rocky are called what kind of planet? Inner Planet
Two key ideas explain why Earth has seasons, what are they? Tilt and Revolution
What name is given to small molten rock bodies that develop at the beginning of a star system? Planetesimals
The nebula's balance between gravity and inner pressure ends with the nebula collapsing and spinning which direction? counter clockwise
As temperature increases so does what? pressure
Created by: Christine160
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