Solution:
Mount Gamkonora is stratovolcano which erupted in 2007. It is located on Halmahera island in Indonesia. It has shifting eruption centres which has lead to an elongated series of craters along N-S trending rift.

Solution:
Soil particle by size in the descending order are Gravel, Sand, Silt and Clay.

Solution:
Granite rocks are changed to Gneiss during metamorphism as they get structurally re-aligned due to intense heating (high temperature) and pressure.

Solution:
Peat is the first stage in the formation of coal. Normally, vegetable matter is oxidized to water and carbon dioxide. However, if plant material accumulates underwater, oxygen is not present and so only partial decomposition occurs.

Solution:
The theory of continental drift is supported by similarities between the coastline of South America and Africa, the similarity of rocks of Central Africa, southern India, Brazil and Australia, evidence of fossils and survival of marsupials in Australia.

Solution:
Winds blowing constantly in one direction in rocky deserts form Yardangs. In the region of soft rocks such as sedimentary rocks where winds blow constantly in one direction, they impact the surface of the rocks and blow away their material through dual processes of deflation and abrasion. This leads to fromation of Yardangs.

Solution:
Tsunami is a large sea wave caused by an earthquake experienced along the coasts of Japan. An earthquake generates a tsunami if it is of sufficient force and there is a violent enough movement of the seafloor to cause substantial and sudden displacement of a massive amount of water. Tsunami (pronounced soo-NAH-mee) is a Japanese word, and in fact tsunamis are fairly common in Japan.