plate tectonics worksheet 7th grade

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Name:
Plate Tectonics Worksheet – PAGES 90-99
Use this word bank to match the vocabulary words with their
definitions.
Pangaea
plate tectonics
divergent boundary
mantle convection
mid-ocean ridge
tectonic plate
transform boundary
ridge push
sea-floor spreading
convergent boundary
subduction
slab pull
1. A boundary where two plates move away from each other.
2. An oceanic plate moving under another plate at a convergent
boundary.
3. A piece of the lithosphere.
4. The process in which hotter molten rock rises and cooler molten
rock sinks.
5. A single large landmass that scientists believe broke up into the
continents we have today.
6. A boundary where two plates collide.
7. The theory of how and why the continents move over time.
8. The process in which cooler crust sinks into the mantle, dragging
the whole plate in that direction.
9. A boundary where two plates slide past each other and sometimes
create earthquakes.
10.
The process in which new crust at a mid-ocean ridge sinks
and causes the plates on either side to move.
11.
Huge underwater mountain range.
12.
Theory that explains why the age of the crust by a midocean ridge follows a symmetrical (mirror) pattern.
Name:
Plate Tectonics Worksheet – PAGES 90-99
Here are some things that could happen at plate boundaries. Mark a red
X if you would expect it to happen at a convergent boundary. Mark a
blue circle if you would expect it to happen at a divergent boundary.
Mark a green + if you would expect it to happen at a transform
boundary.
13.
earthquake
14.
sea-floor spreading
15.
ridge push
16.
subduction
17.
slab pull
18.
NO new crust formed or old crust destroyed
19.
mid-ocean ridge
20.
mountains on land
21.
Which crust is denser, continental or oceanic?
22.
Which crust is denser, new crust or old crust?
23.
Which crust is thicker, continental or oceanic?
24.
If continental and oceanic crust collide, which crust sinks
under the other one (subducts)?
25.
Name one reason scientists started to think that the
continents have moved.
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