Planet Basics
This planet is known as the “Red Planet.”
What is Mars?
One year on Mars lasts about this many Earth days.
What is 687 days?
The main gas in Mars’s atmosphere is this.
What is carbon dioxide?
Mars has this number of moons.
What is two?
Scientists think Mars formed from this swirling material around the young Sun.
What is gas and dust?
Mars is this number planet from the Sun.
The Fourth
A day on Mars is almost the same as Earth’s and lasts about this long.
What is about 24.6 hours?
Mars is very cold because its atmosphere is this compared to Earth’s.
What is thin?
The names of Mars’s moons are Phobos and this.
What is Deimos?
One mystery is whether Mars ever had this
What is life?
Mars is about this many million miles from the Sun.
What is about 142 million miles?
Mars moves around the Sun in this shape path.
What is an oval (ellipse)?
Mars has the tallest volcano in the solar system called this.
What is Olympus Mons?
These machines sent by scientists explore Mars’s surface.
What are rovers?
Mars has huge storms made of this.
What is dust?
Compared to Earth, Mars is about this fraction of Earth’s size.
What is about half the size?
This force keeps Mars moving around the Sun.
What is gravity?
Mars’s reddish color comes from this rusty material in its soil.
What is iron oxide (rust)?
This type of spacecraft orbits Mars and takes pictures from above.
What is an orbiter?
Mars’s gravity is about this fraction of Earth’s.
What is about one-third?
This is the approximate diameter of Mars in miles
What is about half the size?
Because Mars rotates like Earth, it also has these daily changes.
What are day and night?
Scientists think Mars once had this liquid on its surface.
What is water?
Studying Mars helps scientists learn this big question.
What is whether life could exist on other planets?
One fun fact: sunsets on Mars appear this unusual color.
What is blue?