Earths formation and interior layers Flashcards
during the iron catastrophe heavy elements such as ____ and ____ sank towards the earths center. these elements form in the earths core.
iron and nickel
what currents carry heated materials to the earths surface and help cool the planet?
convection currents
_____ according to many scientist what created the earths primitive oceans and atmosphere
volcanism
the term for growth by addition is ____
accretion
the term for the part of the mantle that is described as plastic like
asthenosphere
rock formed from molten magma is called ______
igneous rock
what type of seismic wave can not pass through liquid?
secondary
the lithosphere is made up of the ______
the crust and the solid upper most portion of the mantle
the mantle makes up what percent of the earths volume?
80%
term for the cloud of gas and dust where stars are born
nebula
what is a super nova?
gas and dust blowing off from a dying star
which is a habitat where extremophiles might exist?
a) salt mines
b) volcanic pools
c) on the sea floor near vents
d) in rock
e) all listed
all listed
according to the _____ theory, _____ is the force which causes matter to compress to form our solar system.
nebula, gravity
the theory that suggest that during accretion amino acids came to the planet on meteorites or asteroids
the spore theory
true or false. seismic waves are found on the electromagnetic spectrum
false
