What can you compare Mercury's landscape to?
That of the Moon
What is Venus sometimes called?
Earth's twin
Earth is the ___ largest planet in the solar system.
Fifth
The Red Planet
How many moons does Jupiter have?
79
What are Saturn's rings made of?
Ice and rock
How many rings does Neptune have?
Six
How many years ago was Mercury formed?
4.5 billion years ago
Venus is the _____ planet in our Solar System?
Hottest
What is Earth's atmosphere made of?
Mostly nitrogen and oxygen
Why is Mars red?
The rusty iron in the ground
What is the Great Red Spot?
A giant storm bigger than Earth that has raged for hundreds of years.
What is Saturn mostly made of?
Hydrogen and helium
When was Neptune first confirmed through a telescope?
1846
What is the average temperature on Mercury?
117 0C
What is Venus' atmosphere full of?
Carbon dioxide
How much of Earth's surface is covered by water?
Nearly 70 percent
How long does a summer on Mars last?
Six months
What do some of Jupiter's moons have beneath their crusts?
Oceans
Saturn is the only planet in the solar system that is less dense than ______?
What gives Neptune its blue color?
Methane
How many Earth days does it take Mercury revolve around the Sun?
88
On Venus, the Sun rises every ____ Earth days.
117
How many years ago did life begin on Earth?
3.5 billion years ago
What are the names of Mars' two moons?
Phobos and Deimos
How long does a day last on Jupiter?
10 hours
What does Saturn's yellow color come from?
Ammonia crystals
What is special about Neptune's moon Triton?
It has geysers
How was Mercury created?
By gravity pulling swirling gas and dust together.
What is unusual about the way Venus spins?
The opposite direction of most other planets
What does Earth's atmosphere protect us from?
Incoming meteoroids
Mars has the tallest volcano in the solar system. What is it called?
Olympus Mons (three times as tall as Mt. Everest)
Jupiter is large enough to hold more than ____ Earths?
1300
How many moons does Saturn have (confirmed and unconfirmed)?
82
Neptune's magnetic field is how many times mightier than Earth's?
27 times mightier