Ocean Water Chemistry Concepts

The video explains why oceans are salty while rivers are not. It describes how ocean water evaporates, forms clouds, and rains down, absorbing CO2 and minerals from rocks. These minerals, including sodium and chloride ions, are carried to oceans where they accumulate, maintaining a stable salinity level. Rivers deliver minerals to oceans but do not retain salt, ensuring a balance.

What is the primary source of the ocean's salt content?

• Volcanic eruptions

• Rivers

• Ocean floor sediments

• Marine life

What happens to water vapor after it rises from the ocean?

• It turns into ice

• It immediately falls back as rain

• It disperses into the atmosphere

• It forms clouds and may rain over land

How do water droplets become slightly acidic?

• By mixing with salt

• By absorbing carbon dioxide

• By evaporating

• By absorbing oxygen

What remains as leftovers after animals and plants consume minerals?

• Calcium and magnesium ions

• Sodium and chloride ions

• Iron and zinc ions

• Potassium and nitrate ions

Why do rivers not accumulate salt like oceans?

• Rivers have a filtering system

• Rivers deposit salt into oceans and lakes

• Rivers flow too fast

• Rivers are too shallow

What is the average salt concentration in ocean water?

• 40 grams per liter

• 25 grams per liter

• 30 grams per liter

• 35 grams per liter