Which pollutant is primarily responsible for smog formation?
ALead
BParticulate Matter
CVolatile Organic Compounds
DOzone only
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Which statement best describes the precipitation patterns in the Atacama Desert?
- The Atacama Desert receives regular and significant rainfall throughout the year.
- Some weather stations in the Atacama Desert have never recorded any rainfall.
- Rainfall is common in the Atacama Desert, especially during the summer months.
- The Atacama Desert experiences high levels of precipitation due to its proximity to the ocean.
What is the pattern of food relationships in an ecosystem called?
Which of the following statements accurately describes how nutrients enter ecosystems?
- Chemical weathering of rocks contributes to nutrients entry
- Biological fixation of atmospheric oxygen is a primary way nutrients enter ecosystems.
- Deposition of nutrients from the atmosphere through rain or wind-blown particles facilitates nutrient entry.
- Fertilization is a significant nutrient input, especially in unmanaged ecosystems.
Which of the following statements accurately describes the upper or mountain course of a river?
- The water flows slowly through a wide valley with stable banks.
- The river has significant erosive power, capable of moving large stones.
- Angular stones are smoothed into rounded pebbles by friction.
- The river primarily deposits silt and mud in this stage.
Identify examples of nomadic herder groups.
- The Bedouins of Arabia are an example of nomadic herders.
- The Tuaregs of Western Sahara practice pastoral nomadism.
- The Bishari of northeast Africa are also known nomadic herders.
- The Kurds, historically, have been primarily settled agriculturalists with no nomadic traditions.