Geophysics

Light is transverse in nature.

Divergent plates are tectonic plates that are moving away from each other. As they move apart, magma rises from the mantle and creates new crust at the mid-ocean ridges. This process is responsible for seafloor spreading and the formation of new oceanic crust.

It is Wolf for singular and Wolves for plural.

No It is considered a continental plate although it does cover some ocean

Cannot be done as the Earth is much older than the oldest fossils.

No. Earth's core is made of iron and nickel.

Bouguer anomaly - This anomaly corrects for the gravitational attraction of the rock above sea level.

This correction is done after Free Air correction which accounts to the height of the measurements above sea level.

The simple Bouguer correction is calculated assuming that the rock above sea level is a slab of uniform thickness and density (generally 2.67g/cc for land data, 2.0 or 2.2 for marine data).

This density is called reduction density, and can be calculated with the Nettleton method which states that the optimum density is the one with the least correlation with topography.

In case of rough terrains a Complete Bouguer Correction is needed which accounts for topographic lows and highs (Terrain Correction).

The Bouguer anomaly is best for looking at local and regional gravity anomalies.

Isostatic anomaly - The isostatic anomaly accounts for low density roots needed to balance the topography and can be derived using either Pratt's or Airy's hypothesis and corresponds to the deviation of the crustal structure from floating statically in the upper mantle.

The isostatic anomaly improves on the other 2 anomaly models by taking into consideration the root structure under the crustal structure (mountain range) but that is also a problem as we often don't know what the root looks like.

This type of anomaly is best for the study of the sedimentary sequence, while it is not appropriate for deep crustal studies.

first take two big sheets of thermocol and pace them one above the other.

then leve some place at the back and place a small horozontal piece of thermocol to show blocking of water prepare gates of dam by cutting them into the shapes.

stick them with fevicol and put a layer of plater of Paris or white cement until water stops laeaking.

that's all

There is no consensus as to what caused the Earth to have an axial tilt of 23,5 degrees to the ecliptic (its orbital plane around the Sun). Most planets axes have some tilt, Uranus' axis tilts as much as 89 degrees!

4 examples of Mass wasting are;

1. Rock fall.

2. Landslide.

3. Mud flow.

4. Avalanche.

Eruption

No

At divergent and transform boundaries.

During the Cenozoic, the Earth was cooling and sea levels were rising. The climate was moderated and warmer in the Mesozoic because of high carbon dioxide in the atmosphere.

Before the Cenozoic Era, the earth was still quite warm and had some very wet conditions. The final breakup of Pangaea also occurred during this time evidence shows that there was change in oceans circulation.

As a major event Antarctica broke away from Australia, it then moved over the South Pole. This caused the warm ocean current that had been flowing past Antarctic to be reversed. A cold current began to surround it. The climate of Antarctica cooled, and glaciers formed. With these massive changes in temperatures, land mass movement and changes in ocianic flow the environment became quite unstable.

50 years

Seafloor Spreading.

why the mass wasting accurs

Yes, tectonic plates constantly move around on the Earth's surface. This movement is driven by the flow of the underlying mantle and results in various geological phenomena like earthquakes, volcanic eruptions, and the formation of mountain ranges.

fall

yes

Caribbean Plate

Rather than being perpendicular to the orbital plane of the Earth around the sun, the rotational axis of the Earth is tilted. This is the reason we have seasons.

The Grand Canyon was carved by the Colorado River over millions of years through a process of erosion. The river gradually cut through the layers of rock, exposing the geological history of the region and creating the vast canyon we see today.