Name ___________________________
Changing Earth
Date_______________________
Mr. Finn Team 8-2; Period ____________
Chapter 1 Test Study Guide
1.) Earth’s magnetic reversals are recorded in sea-floor rock
2.) Movement of Earth’s plates is similar to sponges in boiling water
3.) A convergent boundary occurs where plates push together
4.) An egg’s shell makes the best model of the Earth’s crust.
5.) In an oceanic-oceanic subduction a volcanic island is formed
6.) The inner core makes up the center of the Earth.
7.) In an oceanic-continental subduction volcanoes are formed on the top plate
8.) Oceanic crust at a mid-ocean ridge is younger than crust near a trench
9.) A continental-continental collision causes mountain ranges to form
10.) A tectonic plate is a slab of Earth’s lithosphere
11.) Wegener used similar rocks on different continents to support his theory of continental drift
12.) Two plates scrape past each other at transform boundaries
13.) New crust forms along a divergent boundary
For 14-16, identify each type of plate boundary and describe how the plates move along each boundary.
14.
15.
16.
Transform Boundary
Convergent Boundary
Divergent Boundary
Plates move past each other
plates come together
plates move apart
17.) Describe the Earth’s crust and mantle. Include the density and thickness of each layer.
Crust: outermost and thinnest layer. Rocks are less dense, cool and rigid.
Continental Crust: makes up the continents.
Oceanic Crust: forms the ocean floors. Thinner and less dense than continental crust
Lithosphere: located at the very top of the mantle.
Asthenosphere: below the lithosphere. Hotter, softer layer of rock
Mantle: thickest layer. Very hot and dense rocks
18.) On the back, define the Theory of Plate Tectonics and explain how the age of the sea floor helps support
this theory. Theory of Plate Tectonics states that the Earth’s lithosphere is made up of hugs plates that move
over the surface of the Earth. The youngest sea floors are found near mid-ocean ridges while the oldest sea-floor
rocks are found farthest away from the ridges. The difference in the age supports the idea that crust is formed at
mid-ocean ridges and then spreads out. As the sea floor moves, the tectonic plates move as well.