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WorksheetsLO 3 - QUIZ
Total questions: 76
Worksheet time: 38mins
Use the Hydrological Cycle terminology list to identify the process described: evaporation of water from trees and plants into the atmosphere.
Evaporation
Transpiration
Condensation
Precipitation
In the Hydrological Cycle, which process describes water vapour changing into liquid water?
Condensation
Transpiration
Percolation
Infiltration
Which Hydrological Cycle term refers to rain, snow, sleet, or hail falling from the atmosphere?
Surface runoff
Precipitation
Groundwater
Evaporation
Identify the Hydrological Cycle process: rainwater that flows over the ground surface, mostly lost to the sea in Malta.
Infiltration
Surface runoff
Percolation
Transpiration
Which term in the Hydrological Cycle describes rainwater entering permeable geology and being stored underground?
Evaporation
Infiltration
Condensation
Surface outflow
In the Hydrological Cycle, what is the underground movement of rainwater within permeable layers called?
Percolation
Transpiration
Evaporation
Precipitation
Which statement about Malta’s rock formations is correct?
Blue Clay is permeable
Globigerina Limestone is impermeable
Upper Coralline Limestone is permeable
Lower Coralline Limestone is impermeable
What does impermeable mean when describing Maltese rocks?
Water can pass through the rock
Water cannot pass through the rock
Rock contains dissolved salts
Rock allows only gases to pass
Where is Malta’s perched aquifer found according to the formation description?
Within Blue Clay, below Upper Coralline Limestone
Above Blue Clay, within the Upper Coralline Limestone layer
At sea level within Lower Coralline Limestone
Between Globigerina Limestone and seawater
Which aquifer in Malta was discovered in the 1860 s?
Perched aquifer
Mean-sea-level aquifer
Karst aquifer
Alluvial aquifer
The mean-sea-level aquifer mainly occupies which limestone formations in Malta?
Upper Coralline Limestone only
Globigerina and Lower Coralline Limestone
Blue Clay and Upper Coralline Limestone
Basalt and sandstone
Why does fresh water in Malta’s mean-sea-level aquifer form an underground convex lens above seawater?
Fresh water is denser than seawater
Seawater freezes at depth
Fresh water is less dense than seawater
Rainwater cannot infiltrate limestone
In Malta’s north and north-west, agriculture mainly relies on water drawn from which source?
Reverse osmosis plants
Perched aquifers
Desalinated seawater wells
Mean-sea-level aquifer only
During drought, how do Malta’s perched aquifers support agriculture?
They increase rainfall
They act as a buffer by providing water when rainfall is insufficient
They convert seawater to fresh water
They reduce soil salinity
Industrial over-extraction contributing to aquifer depletion in Malta is mainly associated with which activity?
Potable water pumping
Domestic rainwater harvesting
Small-scale agriculture in Rabat
Tourism-related fountains
Why is Malta’s mean-sea-level aquifer particularly vulnerable to saltwater intrusion?
It lies above Blue Clay
It is located at sea level where freshwater–saltwater balance can be disrupted by withdrawal
It contains no limestone
It receives no rainfall recharge
What is a direct consequence when saltwater enters Malta’s aquifers due to disrupted freshwater–saltwater balance?
Groundwater becomes unsuitable due to salinization
Immediate increase in rainfall
Formation of new impermeable layers
Expansion of wetlands
According to the description of desertification, what annual rainfall characterizes desert areas?
More than 560 mm
About 400 mm
300 mm or less
Between 350 and 450 mm
In 2025 , approximately what share of Malta’s drinking water was supplied by the mean-sea-level aquifer?
About 10%
About 30%
About 50%
About 70%
The remaining portion of Malta’s drinking water not supplied by the mean-sea-level aquifer comes primarily from which source?
Rainwater cisterns
Reverse osmosis plants
Perched aquifers
Imported bottled water
Mention threats to Malta’s aquifers ?
Less rainfall reducing aquifer recharge
Over extraction of groundwater
Pollution from agricultural chemicals
Urban development sealing land surfaces
Increased forest cover enhancing infiltration
Describe threats to Malta’s perched and mean-sea-level aquifers?
Over-extraction from excessive pumping
Saltwater intrusion into freshwater aquifers
Urbanization and land use changes that prevent recharge
Habitat destruction reducing areas for recharge
Increased natural recharge from heavy storms
Discuss the uncontrolled groundwater extraction on Malta’s aquifers. Which factors are described as contributing to uncontrolled extraction and its impacts?
Illegal or unregulated wells
High agricultural demand for irrigation
Domestic and industrial use growth
Rapid depletion of aquifers and lowering of the water table
Expansion of wetlands increasing recharge
Define the reverse osmosis (desalination) process ?
A purification process using a semi-permeable membrane to separate water molecules from other substances
A thermal distillation method that evaporates seawater and condenses pure water
A filtration process that removes only large particles from freshwater
A biological treatment that relies on microorganisms to break down contaminants
Describe the role of reverse osmosis (desalination) plants in providing Malta with a potable water supply. What share of Malta and Gozo’s drinking water is presently provided by RO water?
70%
30%
50%
90%
Describe the role of reverse osmosis (desalination) plants with examples in providing Malta with a potable water supply. Which locations are listed as RO plants in Malta? Select all that apply.
Għar Lapsi
Pembroke
Ċirkewwa
Marsaxlokk
Discuss the advantages of reverse osmosis plants ?
High-quality water purification removing a wide range of contaminants
Environmental benefits by reducing pressure on natural water bodies
Improved energy efficiency in modern RO systems
Increased salt content in treated water enhancing taste
Discuss the disadvantages of reverse osmosis plants ?
High energy consumption for operation
Water wastage producing concentrated brine
Regular maintenance requirements and pre-treatment needs
Environmental concerns from brine disposal
Enhanced natural recharge of aquifers
Define sewage treatment ?
Removal of contaminants, organic matter, and harmful microorganisms from household sewage to produce safe effluent for release or reuse
Simple filtration of rainwater before storage
Chemical addition to seawater to make it suitable for irrigation only
Dilution of industrial wastewater with freshwater to reduce toxicity
Describe the role of sewage treatment plants (STPs) with examples in preventing terrestrial and marine pollution in Malta. Which actions are listed as preventing marine pollution?
Removing toxic substances before discharge into the sea
Ensuring treated water meets EU standards at the Ta’ Barkat plant
Promoting harmful algal blooms to increase biodiversity
Increasing degradation of coral reefs by untreated wastewater
Describe the role of sewage treatment plants (STPs) with examples in preventing terrestrial and marine pollution in Malta. Which actions are listed as protecting groundwater and soil quality?
Preventing contaminants from untreated sewage seeping into aquifers
Improving drinking water quality by avoiding groundwater pollution
Allowing untreated sewage to recharge aquifers
Ensuring all sewage in Gozo is treated before disposal to protect limited groundwater resources
Describe the role of sewage treatment plants (STPs) with examples in preventing terrestrial and marine pollution in Malta. Which statements about recycling and reuse of treated water are included?
Treated wastewater can be reused for irrigation, industrial processes, and groundwater recharge
The Sant’ Antnin STP produces high-quality treated water used for irrigation
Recycled treated water is known as New Water
STPs discharge untreated sewage into the sea to boost nutrient levels
Describe the role of sewage treatment plants (STPs) with examples in preventing terrestrial and marine pollution in Malta. Which statements about compliance with environmental regulations are included?
Malta must comply with EU directives such as the Urban Wastewater Treatment Directive
STPs help Malta meet EU standards, protecting terrestrial and marine environments
The Cumnija STP treats sewage and produces high-quality effluent for a significant portion of the population
EU compliance requires discharging partially treated sewage to coastal waters
Explain the importance of sewage treatment plants in providing the agricultural sector with second class (New Water) for irrigation. Which benefits are identified?
Promoting sustainable agricultural practices by reducing reliance on freshwater
Protecting freshwater resources for drinking, industry, and ecological balance
Providing nutrient-rich irrigation water (e.g., nitrogen and phosphorus) that can enhance soil fertility
Increasing the need for chemical fertilizers due to nutrient removal
Identify sources of fresh water in the Maltese islands.
Ground water
Springs
Sea water desalination
Sewage treatment (New Water)
Imported bottled water
Which statement about Malta’s fresh water sources is correct?
All available sources are fit for drinking purposes.
Not all available sources are fit for drinking purposes.
Only sea water desalination provides any fresh water in Malta.
New Water is always supplied as drinking water without treatment.
Traditional water collection in Malta’s semi‑arid climate was commonly achieved by which practice?
Excavating cisterns beneath homes to collect roof rainwater
Drilling deep wells into artesian aquifers
Constructing large river channels across the islands
Expanding coastal desalination plants
Covered reservoirs are used primarily to address which issue in Malta’s hot and dry climate?
Evaporation losses from open reservoirs
Seawater intrusion into aquifers
Soil erosion on farmlands
Salinity increase in groundwater
Chadwick Lakes in Malta is best described as which of the following?
A valley with small-scale dams
A natural coastal lagoon
A major freshwater aquifer
A desalination plant outfall
Which home-level measure directly reduces the amount of water used daily?
Installing low-flow taps, showerheads, and toilets
Using high‑pressure outdoor hoses
Replacing dual‑flush toilets with single‑flush models
Removing aerators from taps
Select the household actions that conserve water at home.
Using water‑efficient washing machines and dishwashers
Implementing greywater recycling systems
Leaving taps running while brushing teeth
Watering lawns during the hottest part of the day
Choose actions that reduce water use in daily activities.
Taking shorter showers
Turning off taps while brushing teeth or shaving
Running dishwashers and washing machines with full loads
Leaving a slight drip in taps to prevent wear
Select gardening practices suited to Malta’s semi‑arid climate that conserve water.
Planting native or drought‑tolerant species
Applying mulch around plants
Using drip irrigation or soaker hoses
Watering during midday for faster absorption
Which installation helps capture and store rainwater for non‑potable uses at home?
Cisterns or rain barrels
Desalination units
Groundwater extraction pumps
Home dehumidifiers
Greywater recycling is best described as which practice?
Reusing water from sinks, showers, and washing machines for flushing or garden irrigation
Treating seawater to produce drinking water at home
Collecting stormwater from streets for direct drinking
Piping rainwater directly into the mains supply
Which travel choice aligns with eco‑conscious tourism to help conserve Malta’s water resources?
Selecting accommodations and activities that emphasize water conservation
Choosing resorts with multiple large swimming pools
Booking only all‑inclusive packages to reduce personal water use
Avoiding visits during the dry season
Opting for locally grown, seasonal produce primarily helps conserve water by which mechanism?
Reducing the water embodied in importing goods
Eliminating all irrigation needs in local farms
Replacing desalination with natural springs
Preventing any household water use
Define floodplain.
A flat or gently sloping area adjacent to a river or stream that is prone to flooding
A steep mountainous area far from rivers
A coastal cliff formed by wave erosion
An urban area with extensive drainage networks
Identify physical and/or human causes that lead to flooding of low‑lying areas.
Flat terrain where water accumulates
Intense and prolonged rainfall overwhelming drainage capacity
Deforestation reducing the land’s ability to absorb rainfall
Conversion of farmland to impervious urban infrastructure
Which improvement helps prevent rainfall flooding in Malta’s urban areas by increasing system capacity?
Upgrading drains and pipes to channel excess rainwater
Reducing tap water pressure in homes
Expanding desalination output
Installing more street lights
In areas prone to frequent flooding, which measure temporarily holds excess water during heavy rainfall?
Retention basins or flood barriers
Deep groundwater wells
Sea walls along all coasts
Underground power cables
Which urban feature helps absorb rainwater and reduce runoff?
Green roofs and rain gardens
Concrete parking lots
Asphalt‑only pavements
Steel‑reinforced flood channels
Which planning approach reduces surface runoff by allowing rainwater to infiltrate the ground?
Using permeable surfaces in roads, pavements, and parking areas
Regulating taller building heights
Increasing road traffic lanes
Installing decorative fountains
Which actions support flood‑risk reduction through landscape management?
Planting trees and vegetation to improve soil absorption
Protecting existing woodlands and natural landscapes
Clearing vegetation to speed runoff
Paving fields to prevent mud
Which policy approach encourages widespread adoption of flood‑prevention practices?
Providing incentives for rainwater harvesting or green infrastructure
Delaying enforcement of land‑use regulations
Maximizing urban sprawl for development
Removing retention basins to free land
Define coastal erosion.
Gradual wearing away of coastlines by waves, tides, currents, and wind, removing material from the shoreline
Rapid building‑up of beaches by human nourishment
Movement of sediment along the coast without removal
Creation of artificial reefs to protect the shore
In coastal geography, what is transportation?
Movement of sediment (sand, pebbles, silt) along the coast by waves, tides, and currents
Conversion of cliffs into beaches by vegetation
Permanent storage of sediment in offshore bars
Erosion of headlands by wind alone
Define deposition in coastal environments.
Accumulation of sediment carried by water, wind, or ice when transporting energy decreases
Removal and retreat of the shoreline by wave action
Longshore drift moving sediment parallel to the coast
Chemical breakdown of rocks by seawater
Which statement best describes hydraulic action as a wave‑erosion process?
Compressed air in rock cracks expands as waves retreat, weakening the rock and causing pieces to break off
Sand grains in waves grind down rock surfaces like sandpaper
Rocks collide and break into smaller, smoother fragments
Sediment settles out of water when energy decreases
Which process is illustrated by the diagram showing waves grinding rock at a cliff face?
Abrasion
Hydraulic action
Attrition
Deposition
Which process is illustrated by the diagram showing rocks in waves colliding and breaking into smaller, smoother pieces?
Attrition
Abrasion
Hydraulic action
Transportation
Wave breaks (breakwaters) are structures built offshore, parallel or slightly angled to the coastline to minimize coastal erosion by acting on incoming waves. What is their primary function?
Reflect waves back to sea to increase scouring
Absorb and reduce wave energy before it reaches the shore
Trap all sediment to build new beaches
Divert tidal currents away from harbors
Which type of breakwater is located offshore and not connected to the land, creating a calm zone behind it where sediment can accumulate?
Attached breakwater
Detached breakwater
Permeable groyne
Sea wall
Groynes are built perpendicular to the shoreline and extend from the beach into the sea. What is their main use along the coast?
To increase tidal range
To interrupt water flow and limit the movement of sediment along the coast (longshore drift)
To deepen offshore channels for navigation
To reflect storm surges away from estuaries
On the illustrated coastal cliff sequence, identify the feature formed by erosion at the base of the cliff where waves attack the rock, creating an indentation that deepens over time.
Wave-cut platform
Cave
Wave-cut notch
Stack
As a wave-cut notch enlarges, what process causes the cliff line to move inland over time?
Deposition of beach sand at the cliff top
Cliff retreat following the collapse of the overhanging section and removal of debris by waves
Growth of dune vegetation stabilizing the cliff face
Construction of sea walls below the cliff
In the headland erosion diagram, which feature forms when a cave breaks through the headland to create a natural bridge with a gap underneath?
Stack
Arch
Stump
Blowhole
According to the headland erosion sequence, what is a stack?
A collapsed stump buried under sand
An isolated vertical pillar of rock left after the roof of an arch collapses, separated from the main headland
A narrow crack produced by freeze–thaw action
A man‑made pillar used to measure tides
What is a stump in the headland erosion sequence?
A short remnant of an eroded stack at or just above the water surface, often visible at low tide
A newly formed arch spanning the headland
A cave before enlargement
A dune created by wind deposition
Which processes enlarge weaknesses (cracks, joints, faults) in a headland to form a cave at its base?
Hydraulic action and abrasion acting on rock weaknesses
Chemical precipitation and dune formation
Glacial plucking and moraine deposition
Vegetation growth and soil creep
During development of an arch, what causes the natural bridge to gradually weaken until collapse?
Continual wave action and weathering acting on the arch
Compaction by heavy machinery
Deposition of loess on the arch
Growth of coral that cements the opening shut
At the Dingli Cliffs on Malta, which coastal process is showcased where the sea erodes the base of the cliffs causing sections to collapse and the cliff line to move inland?
Longshore drift
Cliff retreat
Delta formation
Barrier spit growth
What coastal landform is particularly visible at low tide below the Dingli Cliffs, formed by the continuous erosion of the cliff base by wave action?
Offshore bar
Wave-cut platform
Beach berm
Tombolo
The sea caves at the Blue Grotto near Żurrieq form and enlarge due to waves attacking weaknesses in the rock. Which statement best captures the progression shown there?
Wind erosion converts arches into dunes.
Wave action expands caves; continued erosion can form large arches, initiating the sequence toward stacks and stumps.
Tectonic uplift instantly creates stacks without prior cave formation.
Human excavation forms all arches in the area.
Which event led to the disappearance of the Azure Window (Gozo) above sea level?
Volcanic eruption buried it in ash.
The arch was dismantled for construction material.
Natural erosion accelerated by stormy weather caused the stack to collapse first, bringing down the arch in 2017.
Earthquake tilted the arch but it remains standing.
Ta’ Ċenċ Cliffs on Gozo present evidence of which pair of coastal erosional features?
Barrier islands and tidal deltas
Cliff retreat and wave-cut platforms at the base, with caves that could develop into arches
Coral reefs and lagoons
Mudflats and salt marshes
