Earth's Layers
What is the uppermost layer?
Crust
Earthquakes are caused when what happens?
Plates move.
4.6 billion years old
What type of boundary is it called when two plates slide past each other?
Transform boundary
What is the name of the supercontinent which existed about 250 million years ago, where most of earth's land formed one large massive continent?
Pangea
Which layer is liquid rock?
Mantle
Where do volcanoes usually form?
Along plate boundaries
What is the first Era in Earth's history?
Pre-Cambrian
What type of boundary is it when plates are separating?
A divergent boundary
What is the name of the scientist who brought forth the idea that the continents are drifting or moving?
Alfred Wegner
Which layer is solid metal?
Inner core
Where in the US did we recently have a large earthquake which cracked open up the earth, destroying roads?
Alaska
The Paleozoic Era (Earth's second era) is know as the Age of....
Fish
Which type of plate is it when two plates are pushing into one another, usually causing one to SUBDUCT under the other?
A convergent boundary
Name 3 of the pieces of evidence that was used to support the idea of continental drift.
Climate info - Coal in the polar regions from tropical plants. Also, glacial marks in tropical regions.
Fossils matching
Rock profiles matching (age and type)
Continents fit like pieces of a puzzle
What is created when magma is released from the mantle and cools time and again.
Volcanic mountain
Dinosaurs and reptiles reined supreme during the Age of Reptiles, also known as the _____ Era
Mesozoic Era
When one plate subducts under another, the old crust...
Melts
6,400 km
What do we call the solid layer of earth that is broken into large pieces called tectonic plates?
Lithosphere
What is the name of the scale that measures the magnitude (size) of earthquakes?
The Richter Scale
We are currently in the Cenozoic Era, which is also called the Age of ________
Mammals
What is causing the plates to move?
Convection currents in Earth's mantle
Shield, composite, and cinder cone