b. supergiant.
c. protostar.
d. nebula
Sea salts, fine-soil, smoke and soot, pollen and microorganism, and volcanic ash are examples of particulate matter. These small particles in air can originate from natural sources or human activities. While they play a crucial role in ecological cycles, excess particulate matter due to pollution can damage ecosystems and built structures.
Sea salts from breaking waves, fine-soil blown into the air, smoke and soot from wildfires, pollen and microorganisms lifted by the wind, and ash from volcanic eruptions are all examples of particulate matter. These are small particles such as dust, dirt, viral particles, and bacteria that are present in the air. They can originate from both natural sources, like volcanic eruptions, and from human activities, like burning fossil fuels.
Particulate matter plays an essential role in various ecological processes. For instance, sulfur dioxide, a form of particulate matter, can become available to terrestrial and marine ecosystems when dissolved in precipitation or when it falls directly to Earth as fallout. This process contributes to the nutrient cycle, allowing decomposition of living organisms to return sulfates to the ocean, soil, and atmosphere.
However, excessive amounts of particulate matter, often resulting from pollution, disrupt natural cycles and can be harmful. Acid rain, which results from rainwater falling through sulfur dioxide gas, is a direct consequence of this. It can damage aquatic ecosystems and built structures, indicating the wide-ranging effects of these particles on our environment.
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B. An avalanche caused by skiers
C. The lowering of land surface caused by wind
D. High tides caused by full moons
Answer:
c is your answer
Explanation:
got it right on edge
Answer:
C. Japan had few natural resources and needed to get them from somewhere else
Explanation: Among the other choices, this is the statement that most likely explains why Japan so actively sought to claim foreign lands during its imperial period.