The third planet from the sun.
What is Earth?
About this much of Earth is covered by oceans.
What is 70%?
Earth is the only planet known to have this.
What is life?
This layer surrounds Earth and gives us air to breathe.
What is the atmosphere?
Earth takes about this long to travel around the Sun.
What is one year?
Most of Earth's water is found here.
What are the oceans?
Earth's continents slowly move. This is called...
What is continental drift?
This field helps protect Earth from solar radiation.
What is Earth's magnetic field?
Earth is about this many miles from the Sun.
What is 98 million miles?
Water can be found as a solid, liquid, and ____.
What is gas?
Earth's average surface temperature is about...
What is 59 degrees?
The atmosphere helps burn up space rocks called ____.
What are meteors?