History of Earth
Earths surface is covered by what?
Continents and Oceans
What layer do we live on in Earth?
Crust
What does extinct mean?
No longer living or existing
What is the crust?
Outermost layer of the earth
What are characteristics of rocks?
What is the Earth Shaped like?
Sphere or ball
What is a geyser?
Places where hot water and steam shoots up from inside the earth onto its surface.
What is the mantle?
The layer of earth between the crust and core
What do geologists study?
Layers are....
many, more than one
Imaginary line around the middle of the Earth, that divides it into two equal halves.
What are the three groups of rocks?
Igneous, Sedimentary, and Metamorphic
What is the inner core?
What does solid mean?
Keeps its shape; hard
What is preserved?
Kept in good condition over a long period of time
How do we know about the history of the Earth?
The work of many scientists who study rocks and fossils
How do we know Dinosaurs lived on the earth?
Fossilized bones that have been found
How are sedimentary rocks formed?
What is pressure?
When weight or force of something presses or pushes against something else
How does the earth change?
What are the layers of Earth?
Crust, mantle, outer core, inner core
What are fossils?
Preserved imprint or body of a plant or animal that died many years ago
What does destructive mean?
Causing damage
It can change, does not stay the same
A mountain that forms over a crack in the earth's crust. Lava, ash, gas, and fire erupts.