330 million, 500 million, 20K meters squated, dont get the last 2.
Basalt is not a type of sedimentary rock
Answer:
Existing rocks join together under high heat and pressure.
Explanation:
There are three major groups of rocks, igneous rocks, metamorphic rocks, and sedimentary rocks. Each of them has their own unique way in which they form. The igneous rocks are the basis for the formation of the other two, and they form from magma/lava that has cooled off. The metamorphic rocks form from preexisting rocks, where deep into the crust they experience high pressure and temperatures and change their properties. Sedimentary rocks form from the breaking apart from the previous two types of rocks, and later merging together under the right conditions.
The metamorphic rocks can have igneous, sedimentary, or mixed origin. In order for these rocks to form they need to be deep into the crust where the pressure and temperatures are much higher. The high pressure and temperatures lead to the merging of different types of rcoks, change their properties, and create a new type of rock. This is one of the reasons why the metamorphic rocks often have multiple colors and they are alligned like layers.
<u>The three hypothesis about the Indus script:</u>
Indus script include the symbols which were used by the people during the Indus valley civilization. There were three hypothesis related to this script which were
- Dravidian hypothesis which is the most suitable one for this script.
- Sanskrit hypothesis which was given by an Indian archaeologist named Shikaripua who was responsible for interpreting this language.
- Miscellaneous hypothesis which included a number of hypothesis related to Indus script where most important was Indo-Aryan language.
Answer:
Concave mirrors reflect light inward to one focal point. They are used to focus light.