Define dynamic equilibrium.
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Define dynamic equilibrium.
Dynamic equilibrium is a state of balance within a system which is constantly changing such as a coastal system.
True or False?
Sediments carried by waves are stores in the coast system.
False.
Sediments carried by waves are inputs in the coast system.
Define the term sediment cell.
A sediment cell is a stretch of coastline often bordered by two headlands where the movement of sediment is contained within the boundaries.
When can the coast be regarded as a closed system?
The coast can be regarded as a closed system when one sediment cell is being examined because the sediment is largely recycled within that cell.
What is an example of positive feedback at the coast?
An example of positive feedback at the coast is when waves erode the cliff, releasing material that further abrades the cliff, resulting in even more cliff erosion.
Define the term negative feedback.
Negative feedback is a process that counteracts change, such as when shore erosion widens the wave cut platform, absorbing wave energy and reducing impact on the cliff base.
True or False?
Coastal systems are isolated from other human and physical systems.
False.
Coastal systems are closely linked to other human and physical systems such as the atmospheric weather system or human agricultural systems.
True or False?
During cold glacial periods global sea levels are lower which affects coastal landforms and processes.
True.
During cold glacial periods global sea levels are lower which affects coastal landforms and processes.
What is the impact of current changes in the global carbon cycle on coastal regions?
Current changes in the global carbon cycle are causing coastal regions to erode faster and face a greater risk of coastal flooding.
Are beaches an input, store, output or transfer in the coastal system?
Beaches are a store in the coastal system.