Show:
volcano
earthquakes
plates
continental drift
100

what is magma called when it is surfaced

lava

100

how do scientists measure earthquakes.

seismograph

100

how many plates are on earth

12

100

who came up with the continental drift theory?

Abraham ortelius in 1596

200

eruptions can send ash miles away. 

true or false

true 

200

what is the largest earthquake ever recorded?

9.4 in valdivia

200

all plates move in the same direction. 

true or false.

false.

200

what is the continental drift theory?

it its a theory that all of the continents were all one super continent called Pangaea, but they all started to drift apart and eventually broke apart.
300
volcanoes erupt more often than earthquakes.

true or false

false

300

what two types of waves do scientists use in the seismograph.

P waves and S waves.

300

what is the place where plates slip called.

faults

300

what was the name of the super continent.

Pangaea.

400

volcanoes can be measured.

true or false.

true 

400

what does stress cause.

a reverse fault.

400

where do most earthquakes and volcanoes form.

along the plates.

400

what scientist named Pangaea.

Alfred Wegener 

500

what are vents.

places for air and pressure to release.


500

earthquakes can cause landslides/avalanches

true or false 

true

500

what plates is the ring of fire on.

Pacific, juan de fuca, north american.

500

how long ago was Pangaea? 

around 2 million years ago.