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Ocean Motion
Waves Currents and Tides
| Question | Answer |
|---|---|
| What is the difference between a wave and a current? | Answer:Waves are the transfer of energy. Currents move water and other matter (boats, fish, people, garbage, etc.) |
| In a wave, water molecules a. move in circles that decrease in size with depth. b. move toward the shoreline. c. move in a vertical motion to the sea floor. d. don't move.? | Answer:a. move in circles that decrease in size with depth. |
| The wind blows on the water, passing it's energy to the water. As this energy passes through the water, in what way do the water molecules move? | Answer:In a small vertical circle, circular motion. |
| ______________ water rises and ________________ water sinks? | Answer:Warm (hot), cold |
| Deep currents are caused by:? | Answer:Differences in density (temperature & salinity) |
| When the sun, moon, and earth are all aligned (in a straight line), you have a? | Answer:Spring tide |
| The sun's rays are strongest at the____________ and weakest at the _______________:Hint: the stronger the rays, the hotter it gets!!! | Answer:Equator, poles |
| During a ______ , the sun, the Earth, and moon form a right angle. | Answer:Neap Tide |
| Tides that occur during full moon phases are called? | Answer:Spring tides |
| Corey has a job helping to set new pilings at Cedar Key, Florida. He works all day and notices that on this day, the tide changed very little compared to normal. He notices the moon is in the first quarter phase. "Aha, that explains it", What? | Answer:Neap tide |
| One: The tide has ebbed and is at an unusually low level.Two: A bright full moon is rising over the exposed mud flats and marsh grass. What type of tide has occurred? | Answer:Spring Tide |
| We had to move our beach towels as the ocean water moved toward us during a. tide b. wave c. current? | Answer:tide |
| The most common source of energy for surface waves is? | Answer:wind |
| The gravitational pull of the Earth's moon (and sun) generates what ocean phenomenon? | Answer:tides |
| Hadley is floating on her surfboard at St Augustine Beach, Florida. She entered the water directly in front of her beach chair, she has drifted about 100 yards down the beach and is in front of the Beach Snack Bar. Is it a Wave, current or tide?Why? | Answer:Oceanic currents describe the movement of water from one location to another. |
| Wind causes an up-and-down movement of ocean water, called a ____________. | Answer:Waves |
| What causes high and low tides in the ocean? a.the amount of rain that falls b. gravity interacting between the Earth and the Moon c. movement of the wind | Answer:b. gravity interacting between the Earth and the Moon |
| Spring tides and neap tides occur in patterns governed by the? | Answer:phases of the moon |
| The height of a wave is MOST affected by the: a. speed of the wind b. speed of the ocean c. salinity of the ocean d. amount of solar energy? | Answer:a. speed of the wind |
| Why are the spring tides the highest tides each month? | Answer:the moon, sun, and Earth are aligned, so the pulling forces are combined to produce the highest and lowest tides due to the amount of gravitational force exerted on the Earth. |
| The lowest point on a wave is the wave _______. | Answer:trough |
| The distance between two crests or two troughs of a wave is called the:? | Answer: wavelength |
| Explain how the audience at a sporting event “doing the wave” is similar to a wave travelling in the open ocean. | Answer:Because it is a transfer energy through a body of matter (people or water) |
| What are currents? | Answer: A current is a strong river-like flow within the ocean. A current can be hot or cold water. |
| Compared with surface currents, deep currents are: a. colder and less dense. b. warmer and less dense. c. warmer and denser. d. colder and denser. | Answer:d colder and denser. |
| What is the initial energy source for ocean currents and wind? A. the rotation of Earth B. the moon’s gravity C. the sun D. continental deflections | Answer:C. the sun |
| What combination of tides is occurring when you see the full moon directly overhead? A. high tide during a neap tide B. low tide during a neap tide C. high tide during a spring tide D. low tide during a spring tide | Answer: C. high tide during a spring tide |
| The two main parts of a wave are the ? a. swell and whitecap. c. crest and trough. b. wavelength and wave height. d. rise and dip. | Answer: c. crest and trough. |
| Why are the tides predictable? | Answer: Because Earth’s rotation is predictable, the tides are also predictable. The moon takes 24 h and 50 min to rotate to face the moon again. Therefore, high and low tides at that place happen about 50 minutes later each day. |
| If you have a calendar that shows only the phases of the moon, can you predict when spring tides and neap tides will happen? Explain your answer.? | Answer:Yes, spring tides happen during the full moon and the new moon, and neap tides happen during the moon’s first-quarter and third-quarter phases. |
Created by:
alleyne