Coastal Connections
Ocean Salt Has a History Beyond the Nearest River
Follow a simple account of ocean salts from weathered rock and seafloor processes, keeping sources separate from local changes in salinity.
Follow the water
Explore the coastal notebook
Shoreline Notes
Two High Tides Do Not Have to Reach the Same Height
Understand the difference between diurnal, semidiurnal and mixed tidal patterns, without treating a simple diagram as a local tide prediction.
Coastal Connections
The Sea’s Surface Temperature Does Not Describe Every Depth
Read an ocean temperature profile by following depth as well as temperature, and see why a surface measurement cannot describe the whole water column.
Life Below
A Kelp Forest Is Built by Algae, Not Underwater Trees
Kelp forms underwater canopies that provide food and shelter. Read the forest comparison as a description of habitat structure, while keeping kelp distinct from seagrass.
Coastal Connections
Beach Sand Can Have More Than One Starting Material
A beach can contain mineral grains and fragments of biological material. Learn why colour alone is not enough to tell the complete origin of its sediment.
Shoreline Notes
Sea Foam Is a Process to Ask About, Not a Diagnosis by Colour
Sea foam forms through interacting water, air and dissolved material. Observe it from shore while keeping appearance separate from claims about cleanliness or cause.
Shoreline Notes
A Bathymetric Map Shows the Shape Beneath the Water
Ocean colours on a bathymetric map encode depth rather than the water’s visible appearance. Start with the legend, contours and data notes before comparing places.
Coastal Connections
A Quiet Shore Does Not Describe the Whole Underwater Soundscape
Separate what you hear from shore from claims about sound underwater, then read a marine sound report with the measurement setting in view.