Science Unit E Ch 1 Ocean Water Test

Phytoplankton produce 80 percent of the oxygen on Earth through the process called

• respiration
• photosynthesis
• salinty
• evaporation

What keeps water in the deepest regions of the ocean from freezing

• sunlight
• photosynthesis
• pressure
• sediments

Plantlike plankton are called

• benthos
• zooplankton
• phytoplankton
• nekton

The total amount of dissolved salts in ocean water is called

• density
• pollution
• salt walter
• salinity

In ocean water, oxygen, carbon dioxide, and nitrogen are present as dissolved

• gases
• salts
• solids
• sediments

Animal-like plankton are called

• fish
• shellfish
• phytoplankton
• zooplankton

Sand particles, bits of shells, and decaying organisms that do not dissolve in ocean water form

• salts
• gases
• sediments
• bends

What is a self-contained underwater breathing apparatus usually called?

• scuba equipment
• Trieste
• iron lung
• phytoplankton

In ocean water, sodium chloride, potassium chloride, and magnesium chloride are present as dissolved

• salts
• sediments
• plankton

Water pressure increases as water depth increases

• true
• false