Originated in Sydney in 2007, Earth Hour is a global event ...
A pyroclastic flow (also known scientifically as a ...
A volcanic winter is a reduction in global temperatures ...
Mount Pinatubo is an active stratovolcano located on the ...
A black smoker or sea vent is a type of hydrothermal vent ...
An aftershock is a smaller earthquake that occurs after a ...
0
词条
词汇
2
关注者
47
3
58
1
60
11