What is plankton?
Organisms that drift freely in the water. Examples diatoms.
What is nekton?
The larger, active swimmers in a body of water. Example: Turtles, fish and whales.
What are benthos?
Organisms that live on the bottom of a body of water.
What is intertidal zone?
The shollowest part of the ocean ecosystem.
What is estuary?
They are unique ecosystems that are part salt water and part freshwater.
What is landform?
It is a physical feature on Earth´s surface.
What is relief map?
A map that uses shading to show elevations.
What is topographical map?
It is a map that uses lines to show elevations.
What is atmosphere?
It is the layer of gases that surround Earth.
What is hydrosphere?
All of Earth´s liquid and soil water, including oceans, lakes, rivers, glaciers and ice caps.
What is crust?
The rocky layer of Earth´s surface.
What is mantle?
Mantle is a layer of silicate rock between the crust and the outer core.
What is the outer core?
It is made of liquid metals.
What is inner core?
It is made of solid metals.
