Review 1
Which is NOT a volcanic hazard?
subduction of tectonic plates at a boundary
What evidence suggests that continents were once joined?
the puzzle-like fit of coastlines
Most earthquakes occur
along plate boundaries
How many planets are there?
8
What is Pangaea?
a supercontinent made of the present-day continents
Seafloor spreading is a process that
occurs at mid-ocean ridges.
What causes tectonic plates to move?
convection in the mantle
Name a dwarf planet?
Pluto
Volcanoes form when magma
flows through the crust.
Where do most volcanoes erupt?
along divergent plate boundaries
The total energy released by an earthquake is best measured on the
moment magnitude scale.
What's the biggest star?
Sun
Magnetic stripes on the seafloor show that
Earth's magnetic field has changed.
What happens at a transform plate boundary?
Plates slide past each other.
What have scientists learned more about by studying earthquakes?
the composition and structure of Earth's interior
Millions of small rocky objects
asteroids
What are tectonic plates?
Slabs of crust and upper mantle
. Magma that is rich in gases will form a volcano
that erupts explosively.
Earth is the what planet from the sun
3rd
why do you need a space suit in space?
There's no oxygen