Intro to Astronomy
Of the following, which is the largest? Biome, Galaxy, Solar System, Universe
Universe, Galaxy, Solar System, Biome
What is the name for the following group of planets: Mercury, Venus, Earth, & Mars
Jovian Planets
How do stars (including the Sun) produce their energy?
Fusion
What elements make up the Sun?
Hydrogen & Helium
Explain the difference between Revolution & Rotation?
Revolution: Orbit around the Sun
Rotation: Spinning on axis
What theory is the most accurate for how our Solar System moves? Heliocentric or Geocentric
Heliocentric
Fill in the blanks:
As the earth is closer to the Sun, it moves ______; as the earth is further from the Sun, it moves _____
Faster; Slower
What process is the Moon responsible for?
Tides
Bonus 200 Points: Nutation
What reaction caused by the Sun helps animals and plants to survive?
Photosynthesis
Bonus 200 points for Equation:
6CO2 + 6H2O --> C6H12O6 + 6O2
Earths tilt of 23.4 degrees
What is the theory of how the universe was formed?
The Nebular Hypothesis
What are the requirements for a planet?
1. Must orbit the Sun
2. Must be a spherical shape
3. Must clear its neighborhood
What order would the Earth, Sun, and Moon have to be in for a Solar Eclipse to happen?
Sun Moon Earth
What are the most dangerous and least dangerous EM waves?
Most: Gamma
Least: Radio
What is the difference between Precession and Nutation?
Precession is the Change in direction of Earth's axis
Nutation is the wobbling that occurs during Precession
Why is Pluto not considered a planet?
It cannot "clear its neighborhood"
What does Kepler's First Law of Planetary Motion state?
Planets move around the Sun in an elliptical orbit
What most probable theory explains how we got our moon?
Giant Impact Theory
Explain the life cycle of our star.
Stellar Nebula --> Low Mass Star --> Red Giant --> White Dwarf
When are we the closest and furthest away from the Sun? What is it called?
Closest: Perihelion (January)
Furthest: Aphelion (July)
Name the planets in order from the Sun.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
According to Kepler's 3rd Law of Planetary Movement, what two factors are proportional?
Periods/Orbits & Distance from the Sun
What percentage of cosmic matter is the Sun made up of?
98%
Without an Ozone Layer, what 3 things would we most likely suffer from?
Gamma Rays, X-Rays, & Ultraviolet Rays
How long is Earth's rotation and revolution?
Rotation: 24 hours
Revolution: 365.25 days