What are lava domes? Provide one example. Explain under what circumstances they form and what type of magma is usually involved? Are their eruptions gentle or violent?
Lava domes, also known as volcanic domes and plug domes, are steep-sided, bulbous mountains that form when viscous felsic magma, and occasionally intermediate magma, is forced toward the surface. Because felsic magma is so viscous, it moves upward very slowly and only when the pressure from below is great. Lava dome eruptions are some of the most violent and destructive.
Examples: Mount St. Helens and Mount Pelée
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Where warm, moist, unstable mT air seldom penetrates, such as along the west coast of the United States
A) there are many thunderstorms B) there are very few thunderstorms C) there is no humidity in the air D) there is an excess of humidity in the air
All carbon atoms have six (6 ) protons but the number of neutrons can be six (6 ), seven (7 ), or eight (8 ). Different neutron numbers ____
A)force the atom to bond with elements that it normally would not B)change the atom's atomic mass number and make it an isotope C)cause the atom to be more or less reactive D)change the atom's atomic mass number and make it an ion E)cause the atom to be unstable
?One of the main ways that habitat fragmentation occurs is by logging.
Answer the following statement true (T) or false (F)
Europe's shrinking, aging population could use a youthful boost from immigration, which is already the main source of population growth in most European counties. If birth rates remain at their current low level, the European Union will have a shortfall of 30 million workers by the 2020
Indicate whether the statement is true or false