Atmosphere
This is the lowest level of the atmosphere
What is the troposphere
This planet has the greenhouse effect
What is Venus?
Many people think stars do this (they don't); it's even in a popular children's song
What is twinkle?
He was the first person on the moon
Who was Neil Armstrong?
This was the century in which the Galilean moons were discovered
What is the 17th?
This is the main component of the Earth's atmosphere
What is nitrogen?
This type of planet is closest to the sun
What is terrestrial?
The sun is this type of star
What is a dwarf star?
This was the mission in which America first landed on the moon
What is Apollo 11?
On Mars is this, the largest volcano in the solar system
What is Olympus Mons?
Roughly this percent (to the nearest 10%) of Earth's atmosphere is located in the troposphere
What is 80%?
This used to be a planet
What is Pluto?
This is the approximate number of stars in the Milky Way (to the nearest hundred billion)
What is 200-400 billion?
(note: acceptable answers: 200 billion, 300 billion, 400 billion)
This separates the terrestrial and Jovian planets
What is an asteroid belt?
This type of eclipse is when the moon passes between the sun and Earth
What is a solar eclipse?
This is the heat source of the stratosphere; it's currently being destroyed :)
What is the ozone layer?
This planet has the most potential for life, after Earth
What is Mars?
This is the name of the largest known star
What is Canis Majoris?
This is the largest Kuiper Belt Object
What is Pluto?
Cryovolcanism is when a volcano spews this instead of lava
What is ice?
This gas is highly prominent in the composition and atmosphere of two Jovian planets, making them appear blue
What is methane?
These two planets are also called "ice giants"
What are Uranus and Neptune?
This is the name for when the Earth is at its farthest from the sun
What is aphelion?
This is the number of moons of Jupiter
What is 67?
According to the nebular hypothesis, the sun and planets formed from this
What is a solar nebula?