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.
It is in Asia .
Near Indian ocean.
Answer:
Light is made up of wavelengths of light, and each wavelength is a particular colour.
Explanation:
The colour we see is a result of which wavelengths are reflected back to our eyes. The visible spectrum showing the wavelengths of each of the component colours. The spectrum ranges from dark red at 700 nm to violet at 400 nm.Apr 4, 2012
Answer:
- Plate movements on Earth’s crust create stress.
- This adds energy to the crust, which then bends and breaks, forming mountains and geological basins.
Explanation:
The tectonic plates literally float over the magma. Thus, what makes the tectonic plates move is precisely the movement of this magma! And this movement does not happen at all, but in a cyclical variation, which we call Earth convection currents or cells.
The movement of tectonic plates moving over the asthenosphere (pasty part) interacting over time in a geodynamic process that results in the origin of mountains and geological basins, causing seismic quakes (earthquakes and tidal wave), volcanism, magmatism and other geological events (formation of mountain ranges and underwater pits) all due to these plate movements.
