The main cause of caldera collapse is
A) a fissure eruption that allows the shield volcano to split into two or more parts.
B) collapse of the north flank by landslides.
C) removal of magmas that form pillow basalt.
D) collapse of the roof of a magma chamber as magma erupts.
E) All of these are correct.
D) collapse of the roof of a magma chamber as magma erupts.
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Religions differ in the attitudes that their teachings advocate toward women and
A) national laws often reflect those teachings. B) women are granted more freedoms as a result. C) increase availability of contraception. D) approve the ordination of women.
All of the following are true about tropical climates, except
A) they often exist above 30 degrees latitude. B) they have only minor seasonal variations in temperature. C) they are distinguished from each other primarily by differences in precipitation seasonality. D) their climates are substantially affected by the movement of Hadley cells.
Which of these scenarios can occur when a keystone species disappears from an ecosystem? Assume a time frame 100 years between the disappearance and resulting effects.
A. Other species go extinct. B. The population of the rest of the species explodes. C. Speciation occurs. D. Native species become invasive species.
How does the wind move particles?
What will be an ideal response?