geography water world Flashcards
(73 cards)
What happens when rainfall cannot infiltrate into the ground?
It flows quickly to the river as surface runoff, increasing the likelihood of floods.
What is a drainage basin?
The area of land drained by a river and its tributaries.
What are the two types of erosion that affect rivers?
- Lateral (sideways) erosion
- Vertical (downwards) erosion
What is abrasion in the context of river processes?
When sediment is ‘rubbed’ against the bed and banks as it is transported.
How do rivers transport sediment? List the methods.
- Traction (rolling and sliding)
- Saltation (bouncing)
- In suspension (carried along in turbulent water)
- In solution (dissolved)
What occurs during deposition in a river?
Sediment is dropped when the speed of the water flowing in the river slows down.
In a meander, where does the fastest flowing water occur?
On the outside bend, increasing erosion.
What is the Mariana Trench and where is it located?
The Mariana Trench is in the western Pacific Ocean and its deepest point is the Challenger Deep.
What are the advantages of deep sea mining?
Finding valuable resources for making batteries, which could limit climate change.
True or False: Ocean currents regulate the Earth’s climate.
True.
What is an atoll?
A ring-shaped island with a coral rim that encircles a lagoon.
What causes rising sea levels?
- Melting polar ice caps
- Warming and expanding ocean water
What is soil salination?
The process where freshwater supplies become increasingly salty due to contamination by salt water.
What are tides?
The regular rising (high tides) and falling (low tides) movements of the surface of the sea.
What is the fetch in relation to waves?
The distance of sea that the wind blows over to produce the wave.
Fill in the blank: Waves are created by the wind blowing over the _______.
[sea surface]
What is mechanical weathering?
The physical break-up of rocks by the weather.
What is a headland?
A part of the coastline that projects out into the sea.
What are coral reefs made up of?
Colonies of millions of tiny individual animals called coral polyps.
What is the symbiotic relationship in coral reefs?
Coral polyps provide protection and carbon to zooxanthellae, and in return, the algae supply sugar to the polyp.
What is coral bleaching?
When corals expel zooxanthellae due to prolonged higher water temperatures, appearing transparent.
What is climate change primarily caused by?
Burning fossil fuels which release carbon dioxide into the atmosphere.
List the five ocean basins in size order.
- Pacific
- Atlantic
- Indian
- Southern
- Arctic
What is piracy?
Attacking and robbing ships at sea.