What are the main sources of terrigenous sediments?
Terrigenous sediments are those sediments that have their origins on land and are typically the most common and abundant sediment type on the ocean floor, especially in neritic deposits. There are several sources of terrigenous sediments. First, rivers transport huge amounts of sediments into the ocean and river runoff is the primary source of terrigenous sediments. Scientists predict that 15 billion metric tons of terrigenous sediment is transported by rivers to the ocean each year. Secondly, winds blow dust, sand, and volcanic ash into the ocean. It is estimated that about 100 million tons of dust, sand, and ash blow into the ocean each year.
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Dew PointFor the following questions refer to the temperature and dew point data in the following cities: CityAir Temperature (ºC)Dew Point (ºC)City A3524City B-12-12City C-1-6City D106Suppose the dew point of cold outside air is the same as the dew point of the indoor air. If the door is opened and cold air replaces some of the warm air, what is the new relative humidity indoors?
A. higher than before B. the same as before C. impossible to tell from the information given D. lower than before
Biochemical and organic rocks form from materials produced by living organisms.
a. true b. false
Which two kinds of organisms introduce energy to an ecosystem?
A. Plants and primary consumers B. Plants and algae C. Plants and animals at the very top of the food chain D. Animals in trophic levels III and IV
Which of the following is important in stabilizing resource prices and limiting problems caused by resource scarcity?
A) nonrenewable resources B) source separation C) substitutability D) potential resources