Answer:
The two subcategories of igneous rocks are intrusive and extrusive igneous rocks.
Explanation:
The igneous rocks are the rocks that form from cooling magma and lava. They are the base for the formation of the two other types of rocks. The igneous rocks are divided into two subcategories, intrusive and extrusive.
The intrusive igneous rocks are the ones that form from magma that didn't manage to come out on the surface but gradually cooled off into the crust. The extrusive igneous rocks are the ones that have formed from lava that cooled off and that has come out on the surface or very close to the surface.
Because the extrusive and intrusive rocks take different times to form because of the difference in temperature and pressure on the surface and deep into the crust, they have differences in their appearance. The most noticeable difference is that the intrusive igneous rocks have coarse grains, thus large and well-defined ones, while the extrusive ones have fine grains, thus very small and almost unnoticeable.
The core is made almost entirely of metal. specifically, iron and nickel. The answer is A. hope this help :)
Water vapor or moist air rising over a mountain will cool and precipitate as rainfall.
As water vapor, or moist air approaches a mountain, it will rise because the mountains are in the way. The higher you go up a mountain the colder it becomes. Because of the colder temperature up the mountain, the moist air will cool down to reach what is known as its dew point. The moisture in that air then condenses into clouds and eventually, rain. This is why the heaviest rain occurs on the windward slope of a mountain.
The correct answer is - B) convection currents in the mantle.
There's multiple tectonic plates on the surface on the planet, around 17 from what is known so far, but as the scientific methods are developing there might be few more discovered in the years to come.
These plates are all moving, only few cm per year, but on the long term it influences and changes everything on the surface on the Earth.
The movement of the plates is the result of the convection currents in the mantle layer beneath. These convection currents are essentially the combination of the high temperatures, high pressures, and viscous metals, and they managed to break up the crust on the surface, and with its push force, they are slowly moving the plates.
With the movement of the plates and their collisions and moving away, lots of earthquakes and volcanoes are appearing all over the plate boundaries.
