In each blank, try to type in the
word that is missing. If you've
typed in the correct word, the
blank will turn green.
If your not sure what answer should be entered, press the space bar and the next missing letter will be displayed. When you are all done, you should look back over all your answers and review the ones in red. These ones in red are the ones which you needed help on. Term: Continental Drift Definition: A theory that the continents have not always been in there present locations but have there over millions of years. Term: Names of fossils :Definition: Mesosaurus, cynogathus, lystrosourus, Term: Pangaea
Definition: The continent," when the continents were one. Term: proposed his theory based on(3):
Definition: including paleoglaction Term: Plates
Definition: The large slabs of rocks that form Earth's surface, moving over a of partly molten rock Term: Volcanoes Definition: An opening in Earth's surface that when actives spews out gases, chucks of and melted rock. Term: EarthquakesDefinition: A ground release of built up energy at or under Earth's surface. Term: Mid-Atlantic Definition: The longest mountain range on Earth, from North to South down the middle of Atlantic Ocean.
Term: Oceanographer
Definition: A person who studies the floor Term: Reversal
Definition: The in which Earth magnetic field, over thousands of years, completely reverses its direction Term: PalemagnetismDefinition: The study of magnetic properties in glaciers Term: Striping Definition: A pattern of alternating of different directions of magnetic polarity in rock on the sea floor. Term: Magma Definition: rock beneath Earth's surface Term: RidgeDefinition: The region where magma breaks through the Earth's surface, continually forcing apart old and forming a new sea floor Term: SpreadingDefinition: a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between or ridges and spreads out. Term: Hot Definition: An area molten rocks rises to Earth's surface Term: Plate Tectonic Definition: The theory that the is broken up into large plates that move and then rejoin. Term: Definition: The layer of Earth made up of the crust and mantle, and thickness of 65km to 100km Term: 's crustDefinition: Earth's outermost layer formed by lighter materials, such as silicon and , floating on the top during Earths cooling period. Term: 's thickness and composition Definition: Continental Crust- Made of granite, 70km thick
Oceanic Crust- made from a dense and dark rock called , 10km thick Term: Definition: Earth's layer, lying just below the crust, and making up 70% of the Earth's volume Term: 's thickness and composition Definition: Thickest layer (2900km thick), solid, divided into 2 parts (upper and mantle) Term: CoreDefinition: The layer below Earth's Term: Outer Core's thickness and Definition: Outer core is liquid(2300km )composed mainly of a mix of turc or iron and nickel Term: Inner Definition: Earth's solid Term: Inner Cores's thickness and Definition: (1200km), composed of iron and some nickel. Temp -5000*c to 6000*c Term: Definition: A partly molten layer in Earth upper mantle, just below the Term: ConvectionDefinition: A reoccurring current in the mantle that occurs when hotter, less dense materials rises, cools, and then sinks again.This is believed to be one of the driving forces behind the tectonic plate movement Term: Rift Definition: A steep sided valley on land when magma rises to Earth's surface at a spreading center. Term: pushDefinition: The process in which new at a ridge or rift pushes the old material aside. Term: Subduction Definition: When one goes under another Term: Subduction Definition: An area of subduction, typically where earthquakes and occur
Term: Slab Definition: The pulling of a tectonic plate as its edge subducts deep into the Term: Plate Definition: The region where two plates are in contact Term: Divergent boundaries Definition: A region tectonic plates are spreading aprart Term: Divergent Definition: Tectonic plates that are spreading Term: Convergent boundaryDefinition: A region where tectonic are colliding Term: Converging Definition: tectonic that are colliding Term: Oceanic- continental plate Definition: When an oceanic plate and continental plate collide and the oceanic plate is forced the continental plate, this creates a deep underwater valley called Trench. Term: Definition: A deep valley Term: beltDefinition: A of volcanoes Term: -Oceanic plate convergence Definition: When two oceanic plates collide and subdiction occurs. cooling will causes one plate to be denser than the other and the plate will slide another Term: volcanic ArcDefinition: A of volcanic islands Term: Continental- plate convergence Definition: When continental plates collide subduction does not occur since the plates are similar . Term: Definition: Large breaks in rock Term: Transform Definition: a fault that occurs at a plate boundary. Term: (foci)Definition: the in earth at where the earthquake starts Term: Epicentre Definition: the on earths surface directly above the focus where an earthquake starts Term: waves Definition: vibrations caused by the energy released by an Term: Definition: the study of and seismic waves Term: Waves (L - Waves) Definition: Waves that ripple along Earth's Term: Surface Definition: travels along earths surface and is last to (slowest) Term: Primary Waves (P - )Definition: a type of body (underground) wave that travels at about 6km/s through earths crust Term: wavesDefinition: travels through solid, liquid and gas and is first to (fastest) Term: Secondary waves( S - )Definition: a type of seismic body (underground) wave that at about 3.5km/s causing the ground to move in perpendicular to the direction of the waves motion Term: Secondary Definition: travels through solids but not and is second to arrive (slower) Term: Seisometers Definition: devices that measure the amount of ground motion caused by an earthquake and recorded on a seismo Term: Definition: a of ground motion Term: magnitudeDefinition: Magnitude is a of the amount of energy released during an earthquake Term: VolcanoesDefinition: cone shaped volcanoes: the cone is the result or repeated eruptions Term: shield Definition: volcanoes that form over hot spots: the largest volcanoes on Term: Rift Definition: volcanoes that occur where magma erupts through long cracks in the lithosphere where plates are spreading apart |
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