Normal, clean rain has a pH value of between 5.0 and 5.5, which is slightly acidic. However, when rain combines with sulfur dioxide or nitrogen oxides—produced from power plants and automobiles—the rain becomes much more acidic. Typical acid rain has a pH value of 4.0.
Answer:
D
Explanation:
trees interact with other organisms by providing food, shelter, and nutrient cycling.
Answer:200m
Explanation: If we do the math here we will see that they multiplied 1,000 by 100 to get 100,000 so we will multiply the 2 by 100 and we will get 200.
The correct answer among the choices provided is option A. Lung capillaries are responsible for exchanging carbon dioxide for oxygen from the air. Blood that comes from the heart gets oxygen from the alveoli. The carbon dioxide in the blood goes into the alveoli at the same time.
