WJEC A-Level Geography 601-8455-3
Coastal Landscapes
Glaciated Landscapes
Tectonic Hazards
Changing Places
Water and Carbon Cycles
Global Migration
Global Governance of the Oceans
EcosystemsContemporary theme
Economic Growth and Challenge: IndiaContemporary theme
Economic Growth and Challenge: ChinaContemporary theme
Development in an African ContextContemporary theme
Energy Challenges and DilemmasContemporary theme
Weather and ClimateContemporary theme
Fieldwork and Geographical Skills
Coastal Landscapes
Tides and coastal currents
- 3 things to know
- AS Unit 1
Overview
Diurnal tidal cycle, tidal range and neap tide.
What you need to know
Answer each one before you reveal it.
Most of the UK coast experiences which tidal pattern?
Define tidal range.
Questions from this subtopic
Each one with the model answer underneath.
- 1
What causes tides?
Model answer
The gravitational pull of the Moon, and to a lesser extent the Sun, on the oceans, combined with the rotation of the Earth.
- 2
What is meant by a diurnal tidal cycle?
Model answer
A tidal pattern with one high tide and one low tide in each period of roughly 24 hours.
- 3
Most of the UK coast experiences which tidal pattern?
Model answer
A semi-diurnal pattern, with two high tides and two low tides in roughly 24 hours.
- 4
Define tidal range.
Model answer
Tidal range is the vertical difference in water level between high tide and low tide.
- 5
When do spring tides occur, and what is their effect?
Model answer
Spring tides occur when the Sun and Moon are aligned at new and full moon, producing the largest tidal range of the cycle.
- 6
What is a neap tide?
Model answer
A tide occurring when the Sun and Moon are at right angles to the Earth, so their pulls partly cancel and the tidal range is at its smallest.
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