Marine Biology Lecture #16

Which of the following refers to the intertidal zone?

• sublittoral

• littoral

Which of the following does not affect the tidesa?

• gravitational pull of the moon

• centrifugal force of the Sun

• rotation of the Earth

• centrifugal force around the Sun

How come high and low tides are at different times every day?

• they're not, they're at the same time everyday

• with the Earth's rotation about its axis and the Moons revolution around the Earth, the timing is always slightly off so that after a 24 hour rotation, the moon is in a relatively different spot than it should be

How long is a tidal period?

• every 6 hours and 12 min

• over the course of 24h and 50 min

• after 2 high tides and 2 low tides

• after one high tide and one low tide

There are 2 high tides and 2 low tides every day but they are not of equal size

• semidiurnal

• diurnal

• mixed

2 high tides and 2 low tides of equal size

• semidiurnal

• diurnal

• mixed

1 high and 1 low tide a day

• diurnal

• semidiurnal

• mixed

Time of the month that experiences greater change in tides

• spring tides

• neap tides

Times of the month that experience relatively low tidal change

• spring tide

• neap tide

Which of the following is NOT a challenge that organisms who reside in intertidal communities have to face?

• desiccation

• ability to tolerate wide temperature range

• feeding time

• variability in distribution