Question

1. true or false: seawater is composed primarily of water, with dissolved salts making up a smaller percentage
2. true or false: the major ions in seawater include sodium, chloride, and potassium.
3. true or false: ocean acidification occurs when the ocean absorbs carbon dioxide from the atmosphere, leading to a decrease in ph.
4. true or false: phytoplankton are negatively impacted by ocean acidification because they require high levels of carbonate ions for growth.
5. true or false: the carbon cycle involves the movement of carbon between the atmosphere, ocean, and marine organisms.
6. true or false: nutrient pollution in the ocean can lead to a decrease in algal blooms and increased oxygen levels.
7. true or false: ocean acidification has no significant impact on marine ecosystems or coastal economies.
8. true or false: oil spills can have devastating effects on marine life by blocking sunlight and smothering organisms.
9. true or false: the pacific northwest has seen a decrease in oyster populations due to the effects of ocean acidification.
10. true or false: ocean chemistry is unaffected by human activities and remains constant over time.

Explanation:

1. Seawater is mostly water with dissolved salts as a minor component.
2. Major ions in seawater are sodium, chloride, and magnesium (not potassium as a major one).
3. Ocean acidification occurs when it absorbs CO2, lowering pH.
4. Phytoplankton need carbonate ions for growth and are affected by acidification.
5. The carbon - cycle involves carbon movement between atmosphere, ocean, and marine organisms.
6. Nutrient pollution causes algal blooms and oxygen depletion.
7. Ocean acidification has significant impacts on marine ecosystems and coastal economies.
8. Oil spills can harm marine life by blocking sunlight and smothering organisms.
9. Oyster populations in the Pacific Northwest have decreased due to ocean acidification.
10. Human activities like CO2 emissions affect ocean chemistry.

Answer:

1. True
2. False
3. True
4. True
5. True
6. False
7. False
8. True
9. True
10. False