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Astronomy lesson 8/9

Apologia Astronomy lessons 8 and 9

Know the difference between: meteoroids, meteors and meteorites. Meteoroid-small rocks and dirt floating in space; meteors-meteoroids that hit Earth's atmosphere and completely burn up; meteorites--meteoroids that hit Earth's atmosphere but don't completely burn up (part hits Earth)
Know the difference between comet tails that are blue and yellow. Blue tail--made of steam Yellow tail--made of dust particles
Know the difference between short-period comets and long-period comets. Short-period comets-orbits the Sun every 200 years or less; long-period comets-orbits the Sun every 201 years or longer
Comets do not orbit in a circle. What shape is their orbit? long and elliptical
What is the Asteroid Belt? An area between Mars and Jupiter where large rocks are located
Where on Earth have lots of meteorites been found (more than 10,000)? Antarctica
What is the center of a comet called (it is made up of ice and a large rock)? nucleus
Comets are named for the Greek word kometes which means what? head of hair
What is the difference between asteroids and meteoroids? Size--asteroids are larger than meteoroids
Name the Galilean moons in order by size, largest to smallest. Ganymede, Callisto, Io, Europa
What is the Great Red Spot on Jupiter? A giant hurricane-like storm that travels around Jupiter
How long has the Great Red Spot been raging? more than 300 years
How long is a year on Jupiter? 12 Earth years
How long is a day on Jupiter? 10 Earth hours
What is the name of the biggest moon in our Solar System and which planet is it revolving around? Ganymede is the biggest moon in our Solar System and it is one of Jupiter's moons.
Is Jupiter a terrestrial or gaseous planet? gaseous
Jupiter was named after the Roman god of what? rain, thunder and lightning
The four largest moons of Jupiter are called the Galilean moons. Why? Because they were discovered by Galileo.
What are the two main gases found on Jupiter? hydrogen and helium
Explain gravity assist. It is when NASA scientists use the gravity of planets to help propel or send spacecraft into outer space.
Created by: amcollins