Earth's Structure
What is the outermost solid layer of Earth?
crust
What is the name of the supercontinent that existed 200 million years ago?
Pangaea
What property describe how light reflects from a mineral?
lustre
What causes igneous rocks to form?
Cooling magma/lava
What process lays down sediments?
deposition
What is the thickest layer of the Earth?
mantle
How is continental crust different to oceanic crust?
Continental thicker and less dense
Rocks are made up of what?
Minerals
What forms when magma cools slowly underground?
intrusive rock
What process squeezes sediments together?
compaction
What layer is liquid?
outer core
What type of boundary slides past each other?
Transform
What forms when lava cools quickly at the surface?
Extrusive rock
What process glues sediments together?
cementation
Name of force driving tectonic plate movement
Convection current
Which crust sinks beneath the other at subduction zones?
Which boundary creates mid-ocean ridges?
Divergent
What happens to crystal size when cooling is slow?
large crystals
What substance acts as a glue in sedimentary rock formation?
minerals in water
What layer is solid and very hot?
inner core
What theory explains why continents move?
Plate tectonics
Which boundary causes earthquakes but no volcanoes?
Transform
Magma underground, lava where?
surface
What type of evidence of past life is mainly found in sedimentary rocks?
fossils