In the figure below, two people are looking at the same point in the sky. Which of the following types of light does person A see?
A. unscattered light
B. scattered light
Answer: B
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Salt marshes are ________ ecosystems, while mangroves are ________
A) benthic; freshwater tropical ecosystems B) temperate intertidal; found on subtropical and tropical shorelines C) tropical intertidal; found on temperate shorelines D) freshwater; pelagic E) dominated by kelp; found in coral reefs
Debt relief is increasingly being accepted as one means to help the least developed countries try to overcome some of the fiscal barriers to economic development.
Answer the following statement true (T) or false (F)
Groundwater as a water source may be better than surface water because
A) groundwater may be naturally purified by percolation through soil. B) groundwater is a self-replenishing resource that cannot be exhausted. C) surface water is not naturally self-replenishing. D) groundwater is more easily located than surface water.
A very long-lived magma source located deep in the mantle is called a ________
A) magma welt B) melt well C) hot spot D) basalt spout