1.
The second major layer of Earth's atmosphere, just above the troposphere.
2.
The layer of Earth beneath the crust and above the core; made of semi-solid rock.
3.
The study of Earth's surface structure and the movement of its plates.
4.
A large, slow-moving mass of ice formed from compacted snow.
5.
All regions on Earth where life exists, including land, water, and atmosphere.
6.
Any form of water falling from clouds—rain, snow, sleet, or hail.
7.
The layers of gases surrounding Earth that support life and weather.
8.
Molten rock beneath Earth's surface that can form lava when erupted.
9.
An imaginary line around which Earth rotates, causing day and night.
10.
The curved path of a planet or satellite around another celestial body.
