Earth
What are the most common elements found on Earth?
What are silicon, oxygen, and magnesium?
Which gas dominates Venus and Mars’s atmospheres but not Earth’s?
What is carbon dioxide?
Which mission discovered that Earth and the Sun differ slightly in oxygen and nitrogen?
What is NASA’s Genesis Mission?
What kind of stars absorb the remains of other planets, giving us clues about their composition?
What are white dwarfs?
Earth’s atmosphere is unique because of the presence of this life-sustaining gas.
What is oxygen?
Earth has similar ingredients to many other planets due to which star remains?
What are white dwarfs?
True or False: Earth is the only planet made from silicon, calcium, and magnesium.
False—many other planets have these too.
What isotope of oxygen is more common in the Sun than on Earth?
What is oxygen-16?
How far did scientists look to study exoplanetary systems?
What is 456 light years?
True or False: All planets in the solar system have atmospheres.
True—but they vary greatly.
What was discovered about Earth’s elemental composition compared to 18 planetary systems?
It is very similar—suggesting Earth-like compositions may be common.
Which planet has an atmosphere that is extremely toxic compared to Earth’s?
What is Venus?
What does the difference in isotopes between Earth and the Sun suggest?
What does the difference in isotopes between Earth and the Sun suggest?
What elements were found in white dwarfs that are also found on Earth?
What are calcium, silicon, and magnesium?
What role does Earth’s magnetic field play in supporting life?
It protects from solar radiation and helps retain the atmosphere.