Tides and Salinity Earth Science

What is the average percentage of salt in seawater?

3.5%

Which of the following can increase the concentration of salt in a part of the ocean?

A very hot region where lots of water evaporates from the ocean.

If freshwater is added to a region, what happens to seawater density and salinity?

density decreases and salinity decreases

If seawater gets very cold, what happens to its density?

density increases

What is the term for table salt or sodium chloride when it naturally occurs as a mineral?

halite

Tides are primarily caused by the gravitational pull of the ______.

moon

Spring tides occur during the ______ and _____ moons, when the Moon and the Sun are aligned with Earth.

new moon and full moon

Complete the sentence using the words neap tides, gravitational pull, or tidal range. The difference between the daily high and the daily low tides is the _____ ______.

tidal range

Salinity means _____.

Dissolved salt content in a body of water

T OR F: When the Sun and the Moon exert their gravitational pull in the same direction, the impact of each body's pull is canceled out.

F

Tides are most affected by the

Gravitational pull of the Moon

_____ tides occur during the first and third quarters of the Moon.

Neap

T OR F: Tides are the daily rise and fall of sea level at any given place.

T

The forces of gravity between Earth and the Moon cause _____.

Tides