NASA | In The Zone

Phytoplankton are crucial for life on Earth, relying on light and nutrients for growth. Ocean processes and satellite technology help study their distribution. Human activities can disrupt their balance, leading to dead zones. Satellites like SeaWiFS monitor these changes, highlighting the impact of human and natural factors on Earth's ecosystems.

What are the primary factors that enable the growth of phytoplankton in ocean waters?

• Temperature and salinity

• Light and nutrients

• Pressure and depth

• Wind and tides

How do satellites help in the study of phytoplankton?

• By detecting fish populations

• By measuring ocean temperature

• By tracking ocean currents

• By observing ocean color

What is a 'dead zone' in the context of ocean ecosystems?

• A region with high salinity

• An area with no marine life

• A place with high water temperature

• A zone with excessive phytoplankton growth leading to low oxygen

Which human activity is primarily responsible for the creation of dead zones?

• Oil spills

• Deforestation

• Overfishing

• Nutrient runoff from agriculture

What role do satellites play in understanding the Earth's changing environment?

• They measure atmospheric pressure

• They track animal migrations

• They help monitor biological changes due to human activity

• They provide data on weather patterns