Geography · Unit 4

Rivers and Water

Rivers, the water cycle and flooding

A river is a system that transports water, sediment and energy from high ground to the sea, and its shape at any point tells you which of those it is currently doing most of.

The unit follows a river from source to mouth, covering the landforms erosion and deposition produce at each stage, the drainage basin as the unit of study, the water cycle that keeps it supplied, and flooding as the point where the system meets people.

This unit breaks down into 20 short steps and 120 questions, starting at difficulty 1 and building to 3. Below you can see exactly what it covers, how the path is structured, and worked examples with explanations.

Steps: 20
Questions: 120
Difficulty: 1-3

What this unit covers

River Landforms
The River Course
Flooding
Drainage Basins
The Water Cycle

Where this fits

Pairs with Coasts and Oceans, which is the same set of processes at the boundary with the sea.

Where people slip

Erosion and deposition are not separate stages of a river. Both happen along the whole course, and it is which one dominates locally that produces the landform.

How the unit is structured

Rivers and Water runs as 20 short steps that unlock in order. 15 are practice rounds and 5 are challenge rounds that pull together everything before them. Questions start at difficulty 1 and climb to 3 as you progress.

Step 1 · easierStep 20 · harder

Challenge rounds

Example questions

30 real questions from this unit, with the answer and the reason behind it, grouped by what they practise. There are 120 in the unit altogether.

Drainage Basins

Choose all that applyLevel 1
1. Which of these are ways people use rivers? Select all that apply.
- Drinking watercorrect
- Transport by boatcorrect
- Watering crops on farmscorrect
- Making the sky look blue
Rivers give us fresh drinking water, routes for boats and water for farming, but they do not colour the sky.
Build the sentenceLevel 2
2. Build the sentence that correctly defines infiltration.
Answer: infiltration is water soaking into the soil
Infiltration is the downward movement of water soaking into the soil surface.
Guess the numberLevel 2
3. About how long is the River Nile, the longest river in Africa, in kilometres?
Answer: 6650 kilometres
The Nile is about 6,650 kilometres long, making it one of the longest rivers on Earth.
Match the pairsLevel 2
4. Match each way we use rivers to an example of it.
Answer: Drinking water = Filling taps in homes; Transport = Moving goods by barge; Farming = Watering fields of crops; Energy = Turning a hydroelectric turbine
Rivers are useful for water supply, transport, farming and generating electricity.
Multiple choiceLevel 2
5. What is a watershed?
- The high ground that separates one drainage basin from anothercorrect
- A shed where boats are stored
- The deepest part of a river
- A type of rain cloud
A watershed is the ridge of high land that separates one drainage basin from another.
Fill the blankLevel 3
6. The lateral movement of water through the soil downslope towards a river channel is called ____.
- throughflowcorrect
- infiltration
- percolation
- interception
Throughflow is water moving sideways through the soil towards the river channel.

Flooding

Build the sentenceLevel 1
7. Build the sentence about what causes a flood.
Answer: Heavy rain can make a river overflow
Heavy rain can make a river overflow its banks and flood the surrounding land.
Choose all that applyLevel 2
8. Which of these can be effects of a flood? Select all that apply.
- Homes and roads are damagedcorrect
- Crops in the fields are ruinedcorrect
- People may have to leave their homescorrect
- The river disappears forever
Floods can damage homes, roads and crops and force people to leave, but the river itself remains.
Fact or fibLevel 2
9. Dams can help control flooding by holding back water and releasing it slowly.
Answer: True
A dam stores water in a reservoir and lets it out gradually, which helps reduce flooding downstream.
Fill the blankLevel 2
10. The flat land beside a river that is covered with water when the river overflows is called a ____.
- flood plaincorrect
- watershed
- source
- delta
A flood plain is the low, flat land next to a river that floods when the river bursts its banks.
Guess the numberLevel 3
11. Roughly how many people had to be relocated from flooded towns to make way for the reservoir behind the Three Gorges Dam?
Answer: 1300000 people
Filling the reservoir displaced well over a million people, around 1.3 million.
Match the pairsLevel 3
12. Match each storm hydrograph term to its meaning.
Answer: Peak discharge = The highest flow the river reaches after a storm; Lag time = The gap between peak rainfall and peak discharge; Rising limb = The part of the graph where discharge is increasing; Base flow = The normal flow kept up by groundwater between storms
A storm hydrograph shows base flow, a rising limb up to peak discharge, and the lag time after peak rainfall.

River Landforms

Multiple choiceLevel 1
13. What is a meander?
- A large bend or curve in a rivercorrect
- The very start of a river
- A tall waterfall
- The salty part of the sea
A meander is a curving bend that a river makes as it winds across the land.
Match the pairsLevel 2
14. Match each river feature to its meaning.
Answer: Source = Where a river begins; Tributary = A stream joining the river; Meander = A bend in the river; Mouth = Where a river ends
These are the main parts found along a river from its start to its end.
Odd one outLevel 2
15. Which of these is NOT a part or feature of a river?
- Glaciercorrect
- Meander
- Tributary
- Mouth
A glacier is a slow-moving mass of ice, not a river feature, unlike meanders, tributaries and the mouth.
Picture questionLevel 2
16. 🔺 This fan-shaped landform builds up where a river drops its sediment as it enters the sea. What is it?
- A deltacorrect
- A source
- A meander
- A watershed
A delta is a low, fan-shaped area of land made from sediment dropped where a river meets the sea.
Fill the blankLevel 3
17. As a waterfall erodes the soft rock and retreats upstream over time, it leaves behind a steep-sided, narrow valley called a ____.
- gorgecorrect
- floodplain
- estuary
- watershed
Repeated collapse and upstream retreat of a waterfall carves out a gorge.
Put in orderLevel 3
18. Put the stages of ox-bow lake formation in the correct order.
Answer: Meander bends become more curved -> The narrow neck of land is eroded -> The river breaks through the neck in a flood -> The old meander loop is cut off -> Deposition seals it into an ox-bow lake
A meander's neck is eroded until the river cuts through it, then the cut-off loop is sealed by deposition to leave an ox-bow lake.

The River Course

Fact or fibLevel 1
19. A river always flows downhill, from its source towards lower ground.
Answer: True
Gravity pulls river water downhill from the high source towards the sea.
Fill the blankLevel 2
20. As a river slows down in its middle course, it begins to bend into wide curves called ____.
- meanderscorrect
- waterfalls
- sources
- watersheds
Meanders are the sweeping bends a river forms as it flows across gentler, flatter land.
Match the pairsLevel 2
21. Match each part of a river's course to a feature you might find there.
Answer: Upper course = Waterfalls and rapids; Middle course = Winding meanders; Lower course = A wide flood plain; River mouth = A delta or estuary
Each part of a river's course has its own typical landforms, from rapids near the source to a delta at the mouth.
Multiple choiceLevel 2
22. What is the upper course of a river usually like?
- Steep, narrow and fast-flowing
- Wide, flat and slow-moving
- Full of large deltas
- Always frozen solid
In its upper course a river is steep and narrow, flowing quickly and cutting downwards into the land.
Choose all that applyLevel 3
23. According to the Bradshaw model, which of these usually INCREASE as you travel downstream along a river? Select all that apply.
- Dischargecorrect
- Channel widthcorrect
- Average velocitycorrect
- Gradient of the channel
The Bradshaw model shows discharge, channel width and velocity rising downstream, while gradient falls.
Guess the numberLevel 3
24. The Amazon has the largest discharge of any river. Roughly how much water does it pour into the Atlantic each second?
Answer: 209000 cumecs (cubic metres per second)
The Amazon discharges on average about 209,000 cubic metres of water per second, far more than any other river.

The Water Cycle

Build the sentenceLevel 1
25. Build the sentence about the start of the water cycle.
Answer: The Sun heats water and causes evaporation
The Sun heats water and causes evaporation, the first stage of the water cycle.
Fill the blankLevel 1
26. Rain, snow, sleet and hail are all types of ____.
- precipitationcorrect
- evaporation
- condensation
- collection
Precipitation is any water that falls from clouds, such as rain, snow, sleet or hail.
Multiple choiceLevel 1
27. In the water cycle, what happens during evaporation?
- Liquid water turns into water vapour and rises into the aircorrect
- Clouds turn into rain
- Water freezes into solid ice
- A river flows into the sea
Evaporation is when the Sun heats water and turns it into invisible water vapour that rises into the air.
Match the pairsLevel 2
28. Match each stage of the water cycle to what happens in it.
Answer: Evaporation = Water turns into vapour; Condensation = Vapour forms clouds; Precipitation = Water falls as rain or snow; Collection = Water gathers in rivers and seas
Each stage moves water between the sea, the sky and the land.
Fact or fibLevel 3
29. Water held deep underground as groundwater can remain stored for thousands of years.
Answer: True
Groundwater is a long-term store, and water in deep aquifers can stay there for thousands of years.
Odd one outLevel 3
30. Three of these processes move water within or under the ground. Which is the odd one out because it returns water to the atmosphere?
- Evaporationcorrect
- Infiltration
- Throughflow
- Percolation
Evaporation returns water to the air, while infiltration, throughflow and percolation move water into and through the ground.

Where these questions come from. Each unit starts as a plan of the concepts it should cover and the difficulty it should span. Questions are written against that plan with AI assistance, then checked by a validator that rejects anything without a single defensible answer, an explanation, or plausible wrong options. How we write questions sets out the whole process, and corrections are fixed in the bank and reach the site and the app the same day.

How you practise

This unit mixes 16 different question formats, so you are recalling and applying rather than recognising the same layout every time.

Build the sentence
Choose all that apply
Fact or fib
Fill the blank
Guess the number
Listen and choose
Match the pairs
Multiple choice
Odd one out
Picture question
Put in order
Sort into groups
Spell it
Tap the pairs
True or false
Type the answer

Practise Rivers and Water

120 questions across 20 steps. Start with step one and crawl at your own pace.

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Read about Rivers and Water

Explainers from our blog on what this unit covers. Each one ends with real questions from the bank.

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