Rocks
what are the three types of rock?
igneous, metamorphic, sedimentary
what is magma called when it comes out of a volcano?
lava
what are tectonic plates
what causes earthquakes?
tectonic plates colliding
what are the three layers of the earth
crust, mantle, core
what type of rock is cooled lava?
igneous
name an island that is a volcano
what was the large super continent called?
pangaea
where are earthquakes the most common?
the ring of fire in the pacific ocean
what is erosion
loss of soil/rock due to wind or water movement
what type of rock is caused by layers of dirt and fossils compacted over time?
sedimentary
where are volcanoes common?
ring of fire - in the pacific ocean
why do scientists believe Pangaea existed?
the continents could "fit togther" based on their shapes today and the fossils matched in similar layers
what is it called when an earthquake happens under the ocean floor?
tsunami
which layer of the earth if the thickest?
mantle
what kind of rock is caused by heat and pressure in the centre of the earth
metamorphic
can volcanoes happen under the ocean?
yes
what are the ways plates move?
convergent, divergent, translation
what is the scale used to measure the severity of earth quakes?
richter scale
describe the grandfather rock story
old man coyote lied to the rock, birds broke the rock to help him. He confessed his lie, they fixed the rock and he got squished!
what are rocks made of?
different types of minerals combined together
what causes volcanoes to erupt?
tectonic plates colliding
how much do the plates move per year?
about 2.5 cm (1 inch)
10X worse
what does a seismograph tell us?
the location of an earthquake- they are devices found around the world that show the direction of quake and you can graph them to find the epicentre