divergent boundaries
how many divergent boundary's are there
2
What is a good Representation of the earths layers
A hard boiled egg
define P-waves (Primary)
"Body waves, longitudinal, can go through ALL MATTER, the fastest wave.
__________ is A system of ideas that explains many related observations and is supported by a large body of evidence acquired through scientific investigation.
Theory
How many laws did sir Issac newton make
he made 3 laws
define Convection
Currents in the mantle move the plates as the core heats the slowly-flowing asthenosphere (the elastic/plastic-like part of the mantle).
What is the 1st layer of the earth
The core also know as the ground
Define body wave.
"Seismic waves that travel through the Earth. The two principle types of seismic waves are P-waves and S-waves."
_________ is The process by which Earth's magnetic north pole and magnetic south pole switch positions periodically; a change in the direction in which Earth's magnetic field points.
Magnetic Reversal
what is newtons 1st law
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
what are the two types of divergent boundary's
1. Continental-Continental
2. Oceanic-Oceanic
Lithosphere
made of crust and upper part of mantle; broken into tectonic plates
What Device is used to measure seismic waves
A Seismograph
what is it called when magma travels in a circle pattern heating and rising then cooling then sinking
Convection curent
What is newton 3rd law
For every Force, there is an equal and opposite force
explain Tectonic Plates
The Earth's crust and upper mantle (Lithosphere) are broken into sections called plates
A section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust.
what are the 3 layers of the earth
1.Crust
2. lithosphere
3. core
the way a wave changes as it travels trough something tells you ___________________
There is a change in material
________ is The hypothesis that a single large landmass broke up into smaller landmasses to form the continents, which then drifted to their present locations.
Continental drift
What speed does any item fall not being acted on by another force
9.8m/s
Define subduction
one sinks under the other or
the recycling process that keeps the Earth from growing larger where the denser plate slides underneath the less dense one.
Define sea floor spreeing
The process by which new oceanic lithosphere (sea floor) forms when magma rises to Earth's surface at mid-ocean ridges and solidifies, as older, existing seafloor moves away from the ridge.
define : wave
A disturbance that causes a change of energy from one place to another.
__________ is The theory that Earth's outer layer is made up of large, moving pieces called tectonic plates; the theory explains how plates interact and how those interactions relate to processes such as earthquakes and mountain building.
Plate Tectonics
What is newtons second law
The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object