Marine Science Exam "Tides"

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  • 1/20 Questions

    A tidal cycle is 24 hours and 50 minutes instead of 24 hours because of 

    • The gravitational pull of the sun
    • The shape and size of bays
    • The rotation of the moon around the earth
    • The large tidal range caused by spring tides
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About This Quiz

The 'Marine Science Exam TIDES' assesses understanding of tidal mechanisms, including the effects of lunar rotation and environmental factors on tidal patterns. Key skills include analysis of tidal cycles and recognizing influences on marine environments.

Oceanography Quizzes & Trivia

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  • 2. 

    Dania beach has semidiurnal tides. therefore, the beach will have

    • One high tide and one low tide each day

    • Two high tides and two low tides every 24 hours and 50 min

    • Two unequal high tides every 24 hours and 50 min

    • One daily high tide that is always higher than the high tide of the previous day.

    Correct Answer
    A. Two high tides and two low tides every 24 hours and 50 min
    Explanation
    Dania Beach has semidiurnal tides, which means it experiences two high tides and two low tides every 24 hours and 50 minutes. This pattern occurs due to the gravitational forces of the moon and the sun. The gravitational pull causes the water level to rise, resulting in high tide, and then recede, causing low tide. The cycle repeats twice within a day, with approximately 12 hours and 25 minutes between each high tide and low tide.

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  • 3. 

    When the crest of a tide wave reaches the beach, it will be a 

    • Low tide

    • High tide

    • Spring tide

    • Neap tide

    Correct Answer
    A. High tide
    Explanation
    When the crest of a tide wave reaches the beach, it will be a high tide. This is because high tide occurs when the water level is at its highest point, typically caused by the gravitational pull of the moon and the sun. The crest of a tide wave represents the highest point of the wave, indicating that the water level is at its peak. Therefore, high tide is the correct answer in this context.

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  • 4. 

    During a neap tide, the high tides are lower and the low tides are higher 

    • True

    • False

    Correct Answer
    A. True
    Explanation
    During a neap tide, the gravitational forces of the Sun and the Moon act in such a way that they partially cancel each other out. This results in lower high tides and higher low tides compared to normal. The Sun and the Moon are at right angles to each other during neap tides, causing the tidal range to be smaller. Therefore, the statement "during a neap tide, the high tides are lower and the low tides are higher" is true.

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  • 5. 

    The rhythmic rise and fall of the ocean waters is known as 

    • A lunar day

    • Ocean tides

    • Sea level

    • Tidal range

    Correct Answer
    A. Ocean tides
    Explanation
    The rhythmic rise and fall of the ocean waters is known as ocean tides. Tides are caused by the gravitational pull of the moon and the sun on the Earth's oceans. As the moon orbits the Earth, it creates a bulge of water on the side of the Earth facing the moon, causing a high tide. On the opposite side of the Earth, there is also a high tide due to the centrifugal force created by the Earth's rotation. The areas in between experience low tides. This cycle of high and low tides repeats approximately every 12 hours and 25 minutes, giving rise to the rhythmic nature of ocean tides.

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  • 6. 

    Tides are actually waves

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Tides are actually waves that occur in the ocean due to the gravitational pull of the moon and the sun. These waves cause the water level to rise and fall in a regular pattern along coastlines. The gravitational force from the moon is stronger than that of the sun, resulting in two high tides and two low tides each day. Therefore, the statement "tides are actually waves" is true.

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  • 7. 

    A coast in the gulf of mexico experiences diurnal tides. if low tide occurs at 3 pm on monday, when would the next tide occur ?

    • 9:12 pm Monday

    • 3:25 am Tuesday

    • 9:37 am Tuesday

    • 3:50 pm tuesday

    Correct Answer
    A. 3:25 am Tuesday
    Explanation
    The coast in the Gulf of Mexico experiences diurnal tides, which means it has one high tide and one low tide each day. Since low tide occurred at 3 pm on Monday, the next tide would be the high tide, and it would occur approximately 12 hours later. Therefore, the next tide would occur at 3 am on Tuesday. However, the given options do not include this exact time, so the closest option is 3:25 am Tuesday.

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  • 8. 

    When spring tides occur, the

    • High tides are lower and the low tides are higher

    • High tides are lower and the low tides are lower

    • High tides are higher and the low tides are higher

    • High tides are higher and the low tides are lower

    Correct Answer
    A. High tides are higher and the low tides are lower
    Explanation
    During spring tides, the gravitational pull of the moon and the sun align, resulting in a stronger gravitational force on the Earth's oceans. This causes the high tides to be higher than usual. At the same time, the low tides are lower because the water that would normally be present during low tide is pulled towards the high tide areas. Therefore, during spring tides, the high tides are higher and the low tides are lower.

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  • 9. 

    An area with one high tide per tidal cycle is called a 

    • Diurnal cycle

    • Semidiurnal cycle

    • Mixed semidiurnal cycle

    • Neap tide

    Correct Answer
    A. Diurnal cycle
    Explanation
    A diurnal cycle refers to an area with one high tide per tidal cycle. This means that there is only one high tide and one low tide in a 24-hour period. This type of tidal cycle is typically observed in areas where the gravitational forces of the moon and sun do not have a significant impact on the tides. In contrast, a semidiurnal cycle has two high tides and two low tides in a 24-hour period, while a mixed semidiurnal cycle has two high tides of different heights. Neap tides, on the other hand, occur when the gravitational forces of the moon and sun partially cancel each other out, resulting in lower high tides and higher low tides.

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  • 10. 

    Time of tides and tidal ranges on particular coast are generally not very predictable

    • True

    • False

    Correct Answer
    A. False
    Explanation
    The statement suggests that the time of tides and tidal ranges on a particular coast are generally not very predictable. However, the correct answer is False. This means that the time of tides and tidal ranges on a particular coast are generally predictable.

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  • 11. 

    Which of the following does not generally influece tides:

    • Depth of the water in a tidal basin

    • Shape of the basin

    • Precipitation and evaporation

    • Weather

    Correct Answer
    A. Precipitation and evaporation
    Explanation
    Precipitation and evaporation do not generally influence tides. Tides are primarily caused by the gravitational forces exerted by the Moon and the Sun on Earth's oceans. The depth of the water in a tidal basin and the shape of the basin can affect the amplitude and timing of the tides, but they do not directly influence the occurrence of tides. Weather conditions such as wind and atmospheric pressure can indirectly affect tides by causing changes in sea level, but precipitation and evaporation do not have a significant impact on tides.

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  • 12. 

    tidal bulges are caused and affected by 

    • The gravitational pull of the moon

    • The gravitational pull of the sun and moon

    • Centrifugal force

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    Tidal bulges are caused and affected by the gravitational pull of the moon, the gravitational pull of the sun and moon, and centrifugal force. The gravitational pull of the moon creates a bulge on the side of the Earth facing the moon, while the gravitational pull of the sun and moon together creates another bulge on the opposite side. Additionally, the centrifugal force caused by the Earth's rotation also contributes to the formation of tidal bulges. Therefore, all of these factors play a role in the formation and movement of tidal bulges.

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  • 13. 

    Semidiurnal tides are characterized by 

    • Two daily high tides, one higher than the other

    • One daily high tide

    • Two daily high tides, both of the same approximate hight

    • One daily high tide that is always higher than the high tide of the previous day.

    Correct Answer
    A. Two daily high tides, both of the same approximate hight
    Explanation
    Semidiurnal tides are characterized by two daily high tides, both of the same approximate height. This means that there are two high tides and two low tides each day, with both high tides being of similar height. This pattern is commonly observed in areas where the tidal range is relatively small.

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  • 14. 

    The tidal range is the greatest when

    • The tidal bulges are greatest

    • The moon and the sun are in line and acting together

    • During spring tides

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    The tidal range refers to the difference in water level between high tide and low tide. When the tidal bulges are greatest, it means that the gravitational pull of the moon and the sun is at its strongest, resulting in higher high tides and lower low tides. When the moon and the sun are in line and acting together, their combined gravitational forces create a stronger tidal effect. Spring tides occur when the sun, moon, and Earth are aligned, causing the highest tidal range. Therefore, all of the above options contribute to the greatest tidal range.

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  • 15. 

    The wave length of a semidiurnal tide is a quarter of the circumference of the earth

    • True

    • False

    Correct Answer
    A. False
    Explanation
    The statement that the wavelength of a semidiurnal tide is a quarter of the circumference of the Earth is false. The wavelength of a semidiurnal tide is actually half the circumference of the Earth. A semidiurnal tide occurs twice a day, meaning that there are two high tides and two low tides in a 24-hour period. The wavelength is the distance between two consecutive crests or troughs of a wave, and in the case of a semidiurnal tide, it is half the circumference of the Earth.

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  • 16. 

    If a very low tide occurs at 7:00 pm on may 3rd, what would the tide be called at 10:30pm on may 3rd ?

    • Spring

    • Incoming

    • Diurnal

    • Neap

    • Outgoing

    Correct Answer
    A. Incoming
    Explanation
    The term "incoming" refers to a tide that is rising or coming in. Since the question states that there is a very low tide at 7:00 pm on May 3rd, it implies that the tide is currently going out or receding. Therefore, at 10:30 pm on May 3rd, the tide would be called "incoming" as it is rising again.

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  • 17. 

    If low tide occurs at 12:00am on dania beach, the next high tide will occur at approximately..

    • 12:50 the following day

    • 12:25 pm

    • 6:13 am

    • 6:13 pm

    Correct Answer
    A. 12:25 pm
    Explanation
    The answer is 12:25 pm because the tides typically occur in a regular pattern, with two high tides and two low tides occurring roughly every 24 hours and 50 minutes. Since the low tide occurred at 12:00 am, the next high tide would occur approximately 12 hours and 25 minutes later, which is 12:25 pm.

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  • 18. 

    Key west has mixed semidiurnal tides. if low tide occurs at 12:00 am on a key west bech, the next high tide will occur at approximately

    • 12:50 the following day

    • 12:25 pm`

    • 6:13 am

    • 6:13 pm

    Correct Answer
    A. 6:13 am
    Explanation
    Mixed semidiurnal tides consist of two high tides and two low tides each day, but the heights of the tides differ significantly. Typically, there is about 6 hours and 12.5 minutes between a low tide and the subsequent high tide.
    If low tide occurs at 12:00 am, the next high tide will be approximately 6 hours and 13 minutes later, which would be around 6:13 am.

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  • 19. 

    Tidal range refers to the distance between the high tide level and low tide level on the beach.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Tidal range does not refer to the distance between the high tide level and low tide level on the beach. Tidal range actually refers to the difference in height between the highest high tide and the lowest low tide over a certain period of time, typically a lunar day. Therefore, the statement is false.

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  • 20. 

    At low tide on a sunny day, intertidal animals are faced with the following stresses:

    • Lack of oxygen to breath

    • Possibility of drying out

    • Increased temperature

    • All of these

    Correct Answer
    A. Increased temperature
    Explanation
    At low tide on a sunny day, intertidal animals are faced with increased temperature as a stressor. During low tide, these animals are exposed to direct sunlight and the heat from the sun can quickly raise the temperature of their surroundings. This can lead to dehydration and overheating, which are significant challenges for intertidal animals to cope with. Therefore, increased temperature is a stress that intertidal animals have to deal with during low tide on a sunny day.

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  • Current Version
  • Jun 28, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Jun 06, 2012
    Quiz Created by
    Exclusive_13
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