long-term sea-level changes (section 10.4)

Question 1

geoid

Answer 1

a hypothetical Earth surface that represents the mean sea level in the absence of winds, currents and most tides

Question 2

mean sea level (MSL)

Answer 2

=o m on avg

= equilibrium level

Question 3

changes in sea level can be caused by

Answer 3

• changes in volume of water

- changes in shape and voume of ocean basins (tectonic movements, isostatic adjustments)

Question 4

eustatic sea-level chnage

Answer 4

,- GLOBAL chnage in sea level

Question 5

realative sea-level

Answer 5

-chnage in LOCAL sea level measure with respect to lnd point

Question 6

wilson cycle effect on sea level

Answer 6

lots of new young, hot crust means higher sea level;

Question 7

glacial cycles impacts on sea level

Answer 7

1. ice sheets remove water —->lower sea level

2. glacial loading/ unloadingreshapes crust under and surrounding ice sheets