What is responsible for the red tide phenomenon?

a) The water appears red as a result of reduced levels of photosynthetic pigment.
b) It's a phenomenon that usually coincides with storm surges; the name comes from the red kelp that often washes ashore as a result of rough weather.
c) Red tide occurs in patches of water where certain species of dinoflagellates flourish. They are so abundant that the water becomes discolored and takes on a red hue.
d) Red tides occur once a year and in accordance with the lunar cycle.


C

Environmental & Atmospheric Sciences

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Australia is composed of relatively old and thick

What will be an ideal response?

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When magma intrudes surrounding rock, a piece of the surrounding rock called a(n) _____ may become dislodged and incorporated into the igneous rock as it cools.

A) Xenolith B) Intraclast C) Erratic D) Monolith

Environmental & Atmospheric Sciences

Photovoltaic solar cells work on cloudy days.

Answer the following statement true (T) or false (F)

Environmental & Atmospheric Sciences

The red color in red rocks usually indicates the presence of ____

a. magnesium b. carbon c. silica d. fossilized blood e. iron

Environmental & Atmospheric Sciences