Sea Level, Tides, & Waves Flashcards
changes in sea level is changes to sea ______
volume
what two main processes affect sea level/sea volume?
- how much water is stored in glaciers and ice sheets
2. fact that water molecules expand in warmer temps and contract in cooler
Expansion/contraction of ocean water in response to ________ changes
temperature
______ temperatures means more meltwater from ______.
higher, glaciers
If there is more meltwater from glaciers, then…
the sea level will raise
If you have colder global climates, sea level will…
drop
why will sea level drop with colder global climates?
because there will be more water frozen into glaciers and ice sheets
water molecules expand in _____ temperatures, and contract in _____ temperatures
warmer, cooler
current sea levels _____ at an average of ____ mm per year
rise, 2.5
which areas are more at risk for sea level rises?
low-level flat coastal areas
what are some effects of sea-level rising?
- more erosion during serve storms
- pushed back beaches
- land subsidence.
- causes decreases in fish and shelfish population
what is land subsidence?
AS soil becomes saturated, the land will sink, and houses will sink along with it or down into it
what are tides?
the rise and fall of sea levels that occur on a daily level
Every _____ hours we see two high tides
24
Every 24 hours we see ____ high ties
2
Every ____ hours we see two low tides
24
every 24 hours we see how many low and high tide?
2 of each 2 high, 2 low
