Because there are 2 types of igneous rocks:- •Intrusive rocks-are rocks when the magma cool’s down before reaching the surface of the earth. •Extrusive rocks-are rocks when magma cools down after reaching the earths surface. So their composition can be different because of the formation of the rocks at different places. Eg:-Granite rock:-intrusive rock. Basalt:-extrusive rock
Answer:
Currently the accepted model on how the earth and planets in general form. Before the earth, sun and solar system were around, only tiny particles of space dust and debris were present. Something then happened to disturb these particles, possibly the explosion of a nearby star, and as a result, the sun was born.
The ocean floor and its depth vary a lot from place to place. Maybe it is expected that the central parts of the oceans would be the deepest parts of them, while the closer the ocean floor is to the land it will be shallower, but that is not the case.
The central parts of the oceans have mid-ocean ridges. The mid-ocean ridges are volcanic underwater mountain ranges. There is constant propelling of magma, and as the magma cools off quickly it creates new crust. This results in the mid-ocean ridges gaining heights of up to 1.5 km above the surrounding area.
The further away we move from the mid-ocean ridges, or rather being closer to the oceanic margins, the depth actually increases. The reason for this is the erosiove power of the water, but also the subduction zones. The erosion manages to flatten the ocean floor, thus making it deeper, while the subduction zones are the places where the oceanic plate is moving downward toward the mantle, and it create ocean trenches which are very deep, in fact the deepest parts of the oceans.
Answer:
The Earth also gives us clues about the levels of greenhouse gases that existed in the past. For example, ancient air bubbles trapped deep in the ice of Greenland and Antarctica reveal how much carbon dioxide was present long ago.
Explanation:I learn it in 8 grade.
The five factors that affect the climate are the following;
1. Altitude
2. Latitude
3. Topography
4. Ocean and Large Lakes
5. Earth's Wind
