What is usually responsible for a harmful algal bloom?
a. Diatoms
b. Viruses
c. Cyanobactiera
d. Dinoflagellates
ANS: D
A harmful algal bloom happens when high concentrations of phytoplankton begin to affect nearby
organisms in a negative way. Dinoflagellates are usually the culprits. Some make toxins within their
cells as a by-product of metabolism. This affects marine life through the natural consumption in food
webs. Information can be found in the section Most Phytoplankton are Photosynthetic Autotrophs
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Beaches with very fine-grained sediments tend to be ____
A) relatively steep B) relatively flat C) most common along erosional coastlines D) in areas where the coast is rapidly rising or sinking
When the flow of air is purely geostrophic, how can the wind speed be described and how is this represented on an isobaric map?
Olivine can be converted to spinel through ________
A) directed pressure B) heat C) hydrothermal fluids D) confining pressure
The first step in turning a rock into a sediment is ________
A) gravity and erosional agents (wind, water, etc.) remove material from the parent rock B) weathering alters the rock C) rock is broken into small pieces during the transportation phase D) compaction