Question

estuaries

1. estuaries form where (85)

a. a lake evaporates.
b. a river meets the sea.
c. a river becomes dammed.
d. a wetland becomes filled in.

1. the salinity of estuary water (85)

a. equal to the salinity of river water.
b. less than the salinity of river water.
c. less than the salinity of ocean water.
d. greater than the salinity of ocean water.

Explanation:

1. Estuaries are formed where a river meets the sea. Fresh - water from the river mixes with salt - water from the sea. Lakes evaporating, rivers being dammed, or wetlands being filled in do not form estuaries.
2. River water is fresh water with low salinity, while ocean water is salt water with high salinity. Estuary water is a mixture of river and ocean water, so its salinity is greater than that of river water but less than that of ocean water.

Answer:

1. B. a river meets the sea.
2. D. greater than the salinity of river water and less than the salinity of ocean water.