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chapter 8.2
ocean waves and tides
| Question | Answer |
|---|---|
| the periodic rise and fall of the ocean's surface caused by the gravitational force between Earth and the Moon and between the Earth and the Sun | tide |
| occurs when Earth, the Moon, and the Sun form a right angle; has the lowest tidal range | neap tide |
| the average level of the ocean's surface at any given time | sea level |
| a wave that forms when an ocean disturbance suddenly moves a large volume of water | tsunami |
| occurs when Earth, the Moon, and the Sun form a straight line; has the largest tidal range | spring tide |
| the difference in water level between a high tide and a low tide | tidal range |
| the highest part of a wave | crest |
| the lowest part of a wave | trough |
| the vertical distance from crest and the trough | wave height |
| the horizontal distance from crest to crest or from trough to trough | wavelength |
| the currents formed by wind blowing over the surface of water | surface waves |
| True or False: Waves generally transport water. | False |
| True or False: The motion of the water particles in a wave is circular. | True |
| A _______ is when a wave reaches a certain height and can no longer support the crest from the base, so the wave breaks. | breaker |
| How shallow does water need to be for a breaker to form? | shallower than the base of wave |
| Which disturbances can cause a tsunami? | underwater earthquakes or landslides, a volcanic eruption, or ice breaking away from a glacier |
| What causes tides? | the gravitational force between Earth and the Moon, and between Earth and the Sun |
| Why does the largest tidal range occur during spring tides? | the Sun, Moon, and the Earth are in a straight line causing the strongest gravitational force |
| Why does a neap tide have the lowest tidal range? | The Sun, Moon, and Earth form a right angle. |
| Surface waves are the currents formed by _______ over the surface of water. | wind |
| Is the wave height vertical or horizontal? | vertical |
| Is the wavelength vertical or horizontal? | horizontal |
| A spring tide has the _______ tidal range. | largest |
| What has the lowest tidal range? | neap tide |
| The crest is the ________ part of the wave. | highest |
| The _______ part of the wave is the trough. | lowest |
Created by:
mcclejon5143
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