Answer:
a. granite, andesite, basalt
Explanation:
There are three basic different types of magma: rhyolithic, andesitic, and basaltic. These three types of magma have different properties which differs them from one another, and which cause different types of eruptions. The rhyolithic (granite) magma has very high viscosity. This magma is the thickest, managing to trap gases in it, and because of it it causes highly explosive eruptions. The andesitic magma is moderate in viscosity, and it has explosive eruptions, but also has lava flows that are relatively slow, so it is very unpredictable what kind of an eruption will the volcano have. The basaltic magma is the least viscous. This means that the eruptions of these volcanoes are not explosive, but instead they produce thin lava flows that cover the surrounding area.
Answer:
1. Drainage Basin
2. mouth
3. discharge
4. headwaters
5. meanders.
6. floodplain
Explanation:
A drainage basin is an area where water from precipitation such as rainwater collects before draining into a water body such as a river.
A delta is created where the highest quantity of sediments are deposited at the mouth of a river.
A river's discharge is the quantity of water flowing through a channel in a river.
The headwaters of a river are the source of water of a river, and are usually the farthest point from where it joins/empties into another water body.
Meanders are common feature of A stream with a low to moderate gradient.
A river with a well-developed floodplain has a flat low-lying channel and floods when there is a high quantity of water flowing through the river.
