Illustrates how a simple water filter is constructed and how it functions to produce clean drinking water

IELTS Academic Writing Task 1 - Diagram

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IELTS Writing Task 1 Question

The diagram below illustrates how a simple water filter is constructed and how it functions to produce clean drinking water. Write a report for a university lecturer describing the diagram below.

Common Questions for the Diagram

1. Graph Type: Flow Diagram

2. Title: Construction and Functioning of a Simple Water Filter

3. What are the units of measurement?: Not applicable

4. Who: Users needing clean drinking water

5. What does the diagram depict?: The construction and operation of a water filter

6. When: Not specified; applicable for any time the filter is used

7. Where: In various settings where clean water is required

8. Topic: Water purification processes

Comparison Showing and Trends Any change over time (such as an increase or a decrease) is a trend.

Step 1: Impure Water Entry

Details : Impure water is introduced into a metal container with a wooden lid.

Step 2 : Filtration Layers

Details : The container holds three layers: sand on top, followed by charcoal, and gravel at the bottom.

Step 3 : Water Storage

Details : The filtered water collects in the bottom part of the container.

Step 4 : Transfer Pipe

Details : An angled metal pipe connects the two tanks, allowing filtered water to flow into a second tank.

Step 5 : Clean Water Access

Details : The second tank, positioned lower, has a tap for easy access to the clean drinking water.

Sample Answer

The diagram illustrates the construction and operation of a simple water filter that produces clean drinking water. The process encompasses several steps, beginning with the introduction of impure water and culminating in the delivery of potable water.

Initially, impure water is poured into a metal container, which features a wooden lid. Inside this container, three distinct filtering layers are arranged: sand is positioned at the top, followed by charcoal and gravel at the bottom. As the water passes through these layers, impurities are removed, and the filtered water accumulates in the lower part of the container.

An angled metal pipe, with its lower opening situated at the bottom of the tank, facilitates the transfer of filtered water. The upper section of this pipe extends out of the container and connects to a secondary closed metal tank, which is positioned at a lower level than the first tank. A tap located at the bottom of this second tank allows users to draw clean drinking water as needed.

Overall, the construction of the water filter is straightforward yet effective in transforming impure water into safe drinking water through a simple filtration system.

Top 25 Vocabularies

Vocabulary (type)	Meaning	Synonyms	Examples
Illustrate (v.)	To explain or make something clear by using examples	Demonstrate, depict	“The diagram illustrates the function of the water filter.”
Filtration (n.)	The process of removing impurities from a liquid	Purification, straining	“The filtration process ensures the water is clean.”
Container (n.)	A receptacle for holding or storing something	Vessel, holder	“The impure water is held in a metal container.”
Transfer (v.)	To move something from one place to another	Convey, transport	“Filtered water is transferred to the second tank.”
Access (n.)	The means or opportunity to approach or enter a place	Entry, availability	“Users can access clean drinking water through the tap.”
Process (n.)	A series of actions or steps taken to achieve a particular result	Procedure, method	“The water purification process involves several steps.”
Impure (adj.)	Containing undesirable substances; not clean	Contaminated, dirty	“Impure water must be filtered before use.”
Cumulates (v.)	To gather or accumulate over time	Collect, amass	“The filtered water accumulates in the lower part of the container.”
Layer (n.)	A single thickness of material or substance placed on or between others	Stratum, tier	“Sand forms the top layer of the filter.”
Angled (adj.)	Positioned at an angle; not straight	Slanted, tilted	“The angled metal pipe helps guide the water.”
Facilitate (v.)	To make a process easier or more efficient	Ease, simplify	“The pipe facilitates the transfer of the water.”
Transfer (v.)	To move something from one place to another	Shift, convey	“Water is transferred through the pipe to the second tank.”
Tank (n.)	A large container used for holding liquids or gases	Reservoir, container	“Water is stored in two metal tanks.”
Secondary (adj.)	Coming after or following the primary one	Subsequent, second	“The secondary tank stores the filtered water.”
Filter (n.)	A device used to remove impurities from a liquid or substance	Strainer, sieve	“The water passes through a filter to remove impurities.”
Deliver (v.)	To bring or transfer something to a particular place	Provide, supply	“The system delivers potable water to the user.”
Potable (adj.)	Safe to drink; drinkable	Drinkable, clean	“Filtered water is now potable and safe for consumption.”
Lid (n.)	A cover or top for a container or vessel	Cover, cap	“The container is covered with a wooden lid.”
Situated (adj.)	Located at a particular place or position	Positioned, placed	“The lower opening of the pipe is situated at the bottom of the tank.”
Accumulate (v.)	To collect or gather over time	Amass, gather	“Impurities accumulate in the filtering layers.”
Straightforward (adj.)	Simple and easy to understand or do	Simple, uncomplicated	“The construction of the filter is straightforward.”
Operate (v.)	To control or manage the functioning of something	Control, manage	“The filter operates by removing impurities from the water.”
Effective (adj.)	Successful in producing the desired result	Efficient, potent	“The filter is effective in providing clean water.”
Purification (n.)	The process of removing harmful elements from something	Cleansing, filtration	“Water undergoes purification to become safe to drink.”
Contaminant (n.)	A substance that makes something impure or harmful	Pollutant, impurity	“The filter removes contaminants from the water.”

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