Tides Flashcards
Designed for hydroelectric applications in free-flowing water.
Helical Turbine
It is distinct from tidal power, which captures the energy of the current caused by the gravitational pull of the sun and Moon.
Wave Energy
Turbines rotate in the same direction regardless of the direction of flow. True or False?
True
A zone with a soft-bottomed has silt or sand. True or False?
True
This kind of tide happens when it’s directly facing the moon, and bulges towards the moon.
High Tide
It often has barnacles and seaweeds.
Hard-bottomed
It’s a shallow steep funnel shapes the river and the tides since they’re enhanced as a single wall of water.
Tidal Bore
It needs this to produce Tidal Energy.
Tidal Energy Generators
It is the highest and lowest levels of tides.
High and Low Tides
It uses the temperature difference between cooler deep and warmer shallow or surface seawater.
Ocean Thermal Energy
These turbines are mainly drag-based devices.
Vertical-Axis Tidal Turbines
What is the Tidal Period of Diurnal Tides?
24 hours and 50 minutes
These objects force the currents through a blaze.
Tidal Fences
This kind of tide occurs when the Sun, earth, and moon are aligned.
Spring Tide
It is a type of tide where high tides reach different levels and the low water drops to different levels.
Mixed Tides
Mechanical Energy of tidal currents turns turbines connected to a generator
Tidal Turbines
These are areas that are completely underwater at high tide but remain as pockets of seawater when the tide ebbs.
Tide pools
The height of the average solar tide is about ____% of the average lunar tide.
50%
It exists in a location when the seawater retreats, and reaches its lowest point for a location.
Low Tide
What are the 2 sources of Energy?
Renewable and Non-Renewable
These are very familiar with wind turbines except their below the water surface.
Tidal Stream Generator (TSG)
It is related to the Earth’s rotation and the revolution of the moon around the Earth.
Tidal Period
It is the vectorial difference between the gravitational force of the Earth and that of the moon.
Tidal Force
What are the solutions to the negative impacts?
They solved it by: Barrages that can work farther from land, and smaller Underwater Turbines that are quieter and cost-effecient.
This phase of the moon occurs when it reflects sunlight.
Full Moon
Why are the Vertical-Axis Tidal Turbines called “Vertical-Axis”?
It is because this is vertical to the flow of water.
How many hours for the earth to rotate once on its axis?
24 hours
High Tides occur on the sides of the Earth and the farthest away from the Moon. True or False?
True
What are the 3 main aspects of why we have tides?
Gravitational attraction of the Moon, Gravitational of the Sun, and the Earth’s Rotation
What are the 2 Major Types of Tidal Stream Generators (TSG’s)?
Axial Turbines, Vertical and Horizontal Axis Cross Flow Turbines
What are the 3 Ways to Generate Tidal Energy?
Tidal Barrages, Tidal Fences, and Tidal Turbines
Helical Turbines do require expensive dams that can’t harm the environment. True or False?
False, it doesn’t require expensive dams that can harm the environment.
How many high tides and low tides are there on Semidiurnal Tides?
2 High Tides and 2 Low Tides of equal amplitude
What’s another term for Neap Tides?
Weak Tides
What are the positive impacts of a Turbine? (Give at least 3)
Ocean water is 832 times denser than air and applies greater force on turbines, Easy to install, Predictable energy source, and is Effective at low speeds and long-lasting.
It converts the movement of water coming from a change in tide, the kinetic energy, into electricity.
Tidal Stream Generator (TSG)
What are the examples of Wave Energy (Wave Power)? [Give at least 1]
Electricity Generation, Water Desalination or Pumping Water
These sources of energy are continuously produced in nature which makes it inexhaustible.
Renewable
This phase of the moon occurs when the moon is in the sun’s shadow which make it appear dark.
New Moon
A zone with a hard-bottomed rarely has rocks.
False, it always rocky.
What are the components of Tidal Barrage Power Plant?
Power House, Tidal Barrage, Sluice Ways from Basin to Sea (vice versa), Turbines, Gates and Locks
These turbines can be deployed either vertically or horizontally.
Vertical and Horizontal Axis Cross Flow Turbines
This phase of the moon occurs when the Earth is between the Sun and the Moon
Full Moon
This is to create a water level differential, creating a potential difference that powers the turbine.
Sluice Gate
What are the Modes of Generating a Tidal Power?
Tidal Stream Generator (TSG), Tidal Barrage, Dynamic Tidal Power, Tidal Lagoon
This phase of the moon happens when the moon is between the Earth and the Sun.
New Moon
What is the height of the Tidal Bore?
It moves up to a height of 8m.
Mixed Tides is a variant of a Diurnal Tide. True or False?
False. It is rather a Semidiurnal tide.
How many times does the moon align with the Earth and Sun?
Twice per month.
What is the speed of the Tidal Bore?
25km
What is the second factor in controlling tides on the Earth’s surface?
Sun’s gravity
It is the difference between high and low tide.
Tidal Range
It is the vertical difference between high and low tide.
Tidal Range
Why is the moon’s gravitational pull on liquids much more noticeable than on solids?
Because liquids move more easily than solids.
Intertidal Zone is often marked by tide pools. True or False?
True
It occurs when range is the smallest.
Neap Tide
What is the time for a usual tidal period?
24 hours and 50 minutes
This turbine has the most prototypes currently operating.
Horizontal Axis Tidal Turbine
What would be the effect of the combined pull?
Highest and Lowest Tides
It is derived from the gravitational attraction of masses of the moon and the sun.
Tidal Energy Potential
This kind of tide occurs when the earth, moon, and sun to your location form a 90° angle.
Neap Tide
What are the 2 types of Intertidal Zones?
Hard-bottomed and Soft-bottomed
Wetlands and Marshes belong to what type of Intertidal Zone?
Soft-bottomed
This object turns a turbine or compresses air, which in turn creates electricity.
Tidal Barrage
Ocean Thermal Energy Capacitors can operate with a very high capacity factor and so can operate in base load mode. True or False?
True
What are the 3 places where Tidal Bores commonly occur?
Quintang River, Amazon, Bay of Fundy
It is referred to as the land in the tidal range.
Intertidal Zone
What is the Tidal Period of Semidiurnal Tides?
12 hours and 25 minutes
What is the meaning of Intermittent?
It only produces electricity during tidal surges.
These sources are accumulated over a very, VERY long time and cannot be quickly replaced when exhausted.
Non-Renewable
It has more sea plants and slow-moving creatures like rays.
Soft-bottomed
What would be the Tidal Period if the moon would be stationary?
24 hours
What are the 3 forms of obtained energy from the sea?
Tidal Energy, Wave Energy, Ocean Thermal Energy
It is the flow of water from high to a low tide.
Ebb Tide
This tide occurs when it exists in a location when the wave and water move inshore, to reach their highest point.
High Tide
What is the effect of the gravitational pull of the sun and moon on the Earth as it rotates?
Bulges
Ocean water is 823 times denser than air and applies greater force to turbines. True or False?
False, ocean water is 832 times denser than air.
It is a similar concept to traditional windmills operating under the sea.
Horizontal Axis Tidal Turbine
These are close in concept to traditional windmills operating under the sea.
Axial Turbines
Tides are useful in navigating but aren’t compatible with harnessing to generate energy. True or False?
False. Although it is useful in navigating, it IS compatible with harnessing. This is the reason why it generates energy.
Occurs when the Tidal Range is at its largest.
Spring Tide
How many times the sun is farther away from the Earth than the moon?
390 times farther away from the Earth than the moon
It is a machine that exploits wave power.
Wave Energy Converter
Sluice gates are left open during low tide and closed during high tide. True or False?
False, it’s the other way around.
What is another term for Wave Power?
Wave Energy
One revolution would take how much time?
27 days and 50 minutes
What phases of the moon signify the occurrence of Neap Tides?
First and Third Quarter
It is a dam-like structure used to capture the energy masses of water.
Tidal Barrage
It is the capture of energy of wind waves to do useful work.
Wave Energy or Wave Power
It is the periodic rise and fall of the sea surface, occurring once or twice a day.
Tides
What is the speed of operating the Turbine?
0.6 m/s
One of the negative impacts of a turbine is that it may be harmful to marine life. True or False?
True
What are the negative impacts of a turbine? (Give at least 3)
It may be harmful to marine life. It doesn’t work well in bad weather. Barrages are very loud. It is close to shore, so it has a negative impact on the ocean. Finally, it is intermittent.
What do tidal levels and frequent tides differs by what?
The position of the moon
The Earth’s Surface is not uniform because tides follow the same patterns in all places. True or False?
False, the Earth’s surface is not uniform because the pattern differs depending on where your place is.
This kind of a tide occurs when it pulls the earth away from the water on the opposite side of the earth aswell, making the water on that side bulge.
High Tide
What is another term for Tidal Power?
Tidal Energy
It is a form of hydropower that converts the energy of tides into useful energy like electricity.
Tidal Energy
This kind of tide happens when water is moving toward shore.
Slack Tide
This type of tide has one high tide and one low tide per day.
Diurnal Tide
Another term of Vertical-Axis Tidal Turbines
Floating Waterwheels
