Answer:
C. P waves move matter back and forth, in a direction parallel to the direction of the wave, while S waves move matter up and down, perpendicular to the direction of the wave.
Explanation:
P and S - waves are both called seismic waves. They are produced during deformation within the earth.
Usually, P or Primary waves have the fastest velocity and arrives at the seismic station first. Secondary, Shear or S-waves follows P-waves.
- P-waves are body waves that propagates within a body. They cause movement internally.
- Secondary waves are surface waves. They move on the surface of earth.
- One way to also distinguish between these two seismic waves is that, P-waves are longitudinal waves that travels parallel or longitudinally to the source.
- Secondary waves moves in an up and down motion pattern. They propagate transversely to their source.
Answer:
One program that the Brazilian government created in the 1990s was the Plano Real. The program was successful at first but slowly went down hill in the late 1990s. You can learn more by reading the wikipedia page and doing further research.
Explanation:
It is false that the new oceanic crust is created at the mid-ocean ridges, then the Earth is getting bigger.
Answer: Option B
<u>Explanation:</u>
Amid ocean ridge is a range of the mountain has been formed under the water and a crust is been developed at these ridges through out. Because of the plates moving away from each other, the crust is developed, the lithosphere becomes a little cool but this does not change the size of the earth, neither does it increase nor does it decrease.
