Earth's Rotation and Revolution
Movement of the Earth around the sun
Revolution
First layer that includes landmasses and the ocean floor
The Crust
A high, steep elevation
Mountain
Large bodies of salt water.
Oceans
Mountain that erupts in an explosion of molten rock, gases, and ash.
Volcano
Earth's spin around its own axis
Rotation
The very center of the Earth
The Core
Level, or flat area.
Plain
Largest ocean in the world.
Pacific Ocean
Large, powerful ocean wave that can cause great destruction along the coast.
Tsunami
Earth's tilt in degrees
23.5 degrees
This second layer is divided into upper and lower...
Mantle
It is less steep and rugged than a mountain, usually with a round top.
Hill
Path of water that flows from a higher elevation to a lower elevation.
River
Violent shaking of the Earth's crust.
Earthquake
The exact moment at which summer and winter start.
solstice
It reaches temperatures of 12,000° F
Inner Core
Mountain that erupts in an explosion of molten rock, gases, and ash.
Volcano
Longest river in the world.
Nile
Circle of volcanoes and earthquakes along the rim of the Pacific Ocean.
The Ring of Fire
The beginning of spring and autumn
equinox
Consists of molten, or melted, rocks called magma.
The Mantle
Low-lying area that is surrounded by mountains.
Valley
Second longest river in the world.
Amazon
Most active volcano in Mexico.
Popocatepetl