Ch. 7 Study Guide - Lindbergh Schools
... core is made of rocks (iron-rich minerals) and metals that are magnetic. • Every few hundred to few thousand years the magnetic poles reverse. This makes the rock layers magnetic polarity change. So scientists can tell when the polarity was normal (magnetic north pointing to the north pole and magne ...
... core is made of rocks (iron-rich minerals) and metals that are magnetic. • Every few hundred to few thousand years the magnetic poles reverse. This makes the rock layers magnetic polarity change. So scientists can tell when the polarity was normal (magnetic north pointing to the north pole and magne ...
13.3 Oersted`s Discovery
... Hans Christian Oersted was a Danish chemist and physicist who in 1806 became a professor at the University of Copenhagen. There his first physics research dealt with electric currents and acoustics. During a lecture in 1820, Oersted discovered evidence of the relationship between electricity and mag ...
... Hans Christian Oersted was a Danish chemist and physicist who in 1806 became a professor at the University of Copenhagen. There his first physics research dealt with electric currents and acoustics. During a lecture in 1820, Oersted discovered evidence of the relationship between electricity and mag ...
Electromagnet
... 5.P.5A.1 Use mathematical and computational thinking to describe and predict the motion of an object (including position, direction, and speed). 5.P.5A.2 Develop and use models to explain how the amount or type of force (contact and non-contact) affects the motion of an object. 5.P.5A.3 Plan and con ...
... 5.P.5A.1 Use mathematical and computational thinking to describe and predict the motion of an object (including position, direction, and speed). 5.P.5A.2 Develop and use models to explain how the amount or type of force (contact and non-contact) affects the motion of an object. 5.P.5A.3 Plan and con ...
chapter 15B - plate tectonics 2
... Magnetic polarity reversals •At irregular time intervals, the “magnet turns around”, due to changes in the inner and outer core. •Lava that solidified during these reversals allows us to determine the date of these reversals. •Volcanic rocks dated to 760,000 years ago in several locations, includin ...
... Magnetic polarity reversals •At irregular time intervals, the “magnet turns around”, due to changes in the inner and outer core. •Lava that solidified during these reversals allows us to determine the date of these reversals. •Volcanic rocks dated to 760,000 years ago in several locations, includin ...
Earths-Magnetic-Field
... they have occurred. The evidence comes from rocks on the ocean floor. Look at the figure below which shows a ridge on the ocean floor. At the center of the ridge, hot magma pushes up through the crust and hardens into rock. Once the magma hardens, the alignment of magnetic domains in the rock is fro ...
... they have occurred. The evidence comes from rocks on the ocean floor. Look at the figure below which shows a ridge on the ocean floor. At the center of the ridge, hot magma pushes up through the crust and hardens into rock. Once the magma hardens, the alignment of magnetic domains in the rock is fro ...
vgp302
... lines are drawn out to two Earth radii. Magnetic field is wrapped around the "tangent cylinder" due to the shear of the zonal fluid flow. ...
... lines are drawn out to two Earth radii. Magnetic field is wrapped around the "tangent cylinder" due to the shear of the zonal fluid flow. ...
Sea-Floor spreading
... • The deepest ocean depth to be sounded is Mariana Trench at a depth of 10,911 m (35,798 ft) below sea level. (higher than Mt. Everest) ...
... • The deepest ocean depth to be sounded is Mariana Trench at a depth of 10,911 m (35,798 ft) below sea level. (higher than Mt. Everest) ...
B - Physics 420 UBC Physics Demonstrations
... • The field has direction so we will need to orient probe properly In this case parallel to the field lines (see Diagram) • If the field is negative field line is moving away from the probe Not Important we are only interested in |B| ...
... • The field has direction so we will need to orient probe properly In this case parallel to the field lines (see Diagram) • If the field is negative field line is moving away from the probe Not Important we are only interested in |B| ...
Lecture 4 Sea-Floor Spreading POLAR
... for rocks of different ages from North America and Eurasia produces two curves, the so-called “polar wandering curves”. Note that as the curves get younger they converge. Fitting the continents back together results in a single curve. Nonetheless, the positions still do not correspond with the curre ...
... for rocks of different ages from North America and Eurasia produces two curves, the so-called “polar wandering curves”. Note that as the curves get younger they converge. Fitting the continents back together results in a single curve. Nonetheless, the positions still do not correspond with the curre ...
Aurora
An aurora is a natural light display in the sky, predominantly seen in the high latitude (Arctic and Antarctic) regions. Auroras are produced when the magnetosphere is sufficiently disturbed by the solar wind that the trajectories of charged particles in both solar wind and magnetospheric plasma, mainly in the form of electrons and protons, precipitate them into the upper atmosphere (thermosphere/exosphere), where their energy is lost. The resulting ionization and excitation of atmospheric constituents emits light of varying colour and complexity. The form of the aurora, occurring within bands around both polar regions, is also dependent on the amount of acceleration imparted to the precipitating particles. Precipitating protons generally produce optical emissions as incident hydrogen atoms after gaining electrons from the atmosphere. Proton auroras are usually observed at lower latitudes. Different aspects of an aurora are elaborated in various sections below.