If hydraulic action and abrasion undercut headlands, structures known as ____________________ may form. When these join they form a(n) ____________________, which might later collapse to give a(n) ____________________
Fill in the blank(s) with correct word
sea caves, sea arch, sea stack
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Why can volcanic rocks occasionally contain fossils?
A) Lava does not melt bones. B) Volcanic ash, if builds quickly enough, can preserve the remains of organisms. C) Magma cools so quickly that fossils get trapped inside. D) Organisms were often attracted to volcanoes and fell inside them by accident.
Approximately how much of the world's estimated oil and gas reserves can be found within the sediments of the continental margins?
A) One-third B) One-half C) Two-thirds D) Three-quarters
A line of showers or thunderstorms that develops parallel to, and often ahead of, an advancing cold front is called a(n) ____________________
Fill in the blank(s) with correct word
The field of conservation biology ________
A) developed in response to government intervention B) was initially viewed as too measurement oriented, looking at details and not at the big picture C) attempts to integrate an understanding of evolution and extinction with ecology and environmental systems D) tries to increase speciation events in order to increase biodiversity E) tries to conserve every species, everywhere