Show:
Earth's Moving Plates
Earthquakes and Tsunamis
Volcanoes
Static Electricity
Grab Bag
100
What is a very large landmass called?
A continent
100
Earthquakes usually occur at the cracks between plates called...
faults
100
When rocks, lava and gases are forced out of a volcano, it is called...
an eruption
100
Electrical charge is a _______________ of matter.
property
100
The gigantic slabs of rock that make up the Earth's crust are called...
plates
200
What was the supercontinent that broke up about 200 million years ago called?
Pangaea
200
Shaking is also called...
vibration
200
The central opening in a volcano is called the...
vent
200
What are the two types of electrical charge?
positive and negative
200
Materials that let charges flow through them easily are called...
conductors
300
What is the idea that Earth's plates move over time called?
continental drift
300
Slow movement along faults is called...
creep
300
What type of volcanos make up mid-ocean ridges?
rift volcanoes
300
What is the buildup of electrical charges on an object called?
static electricity
300
What is a vast underwater mountain chain called?
a mid-ocean ridge
400
Plates moving apart as new rock is added at the mid-ocean ridge is called...
Seafloor spreading
400
Tsunamis waves often get bigger when they get closer to...
shore
400
What type of volcano always erupts quickly?
a cinder-cone
400
You touch an object and feel a small electric shock. This shock is called a...
discharge
400
A place where magma partially melts through Earth's crust is called...
a hotspot
500
The deepest parts of the oceans are at...
ocean trenches
500
The Indian Ocean tsunami that took place off the western coast of Sumatra occurred in December of what year?
2004
500
What type of volcano is usually in a symmetric cone shape?
composite
500
Rubber, plastic, and glass are good __________________.
insulators
500
When two ocean plates move toward each other, and one sinks under the other, this makes...
an ocean trench