IELTS - IELTS Reading Mock Tests

Passage excerpt: "Blockchain technology, originally developed as the underlying system for the cryptocurrency Bitcoin, has found applications far beyond digital currency. The technology creates a decentralized, distributed ledger that records transactions across multiple computers in a way that makes the records difficult to alter retroactively. Each 'block' of data is linked to the previous one through cryptography, forming a 'chain.' This structure ensures transparency and security, as changing any information in a block would require altering all subsequent blocks and gaining the consensus of the entire network. Governments and financial institutions worldwide are now exploring blockchain for applications ranging from supply chain management to digital identity verification." Blockchain technology makes it easy to alter recorded information. a) TRUE b) FALSE c) NOT GIVEN

Passage excerpt: "Urban vertical farming involves growing crops in vertically stacked layers, often incorporated into an enclosed environment such as a building. This method contrasts with traditional farming, which requires large amounts of land and water. Vertical farms use hydroponic and aeroponic systems, consuming up to 95 percent less water than conventional agriculture. Additionally, because food is grown in cities, transportation emissions are drastically reduced. However, critics argue that the high energy costs of artificial lighting and climate control make vertical farming unsustainable on a large scale." What is the main concern raised by critics of vertical farming? a) It produces crops that are nutritionally inferior to traditional farming. b) It requires too much land in urban areas. c) The high energy costs of artificial lighting and climate control make it unsustainable. d) It uses hydroponic systems that harm local water supplies.

Passage excerpt: "Cloud computing has fundamentally changed how organizations store and process data. In the early days of computing, businesses maintained their own physical servers, requiring significant investment in hardware, cooling systems, and IT staff. The cloud model, popularized by companies like Amazon Web Services in the mid-2000s, allows organizations to rent computing resources on demand over the internet. This shift has enabled startups to scale rapidly without large upfront infrastructure costs, while enterprises can dynamically adjust their computing power to match fluctuating demand. However, cloud computing raises concerns about data sovereignty, as information stored on servers in different countries may be subject to foreign laws. Additionally, reliance on a few dominant cloud providers creates concentration risk, where a single outage can affect thousands of organizations simultaneously." Complete the summary below using words from the box. | upfront — simultaneously — resources — investment — sovereignty — staff | |--------------------------------------------------------------------| Cloud computing allows organizations to rent computing ______ on demand over the internet, eliminating the need for large capital ______ in physical servers. This model enables startups to scale without significant costs while enterprises can adjust capacity to match demand. However, concerns about data ______ and the risk of widespread outages affecting organizations ______ remain significant challenges." a) resources — investment — sovereignty — simultaneously b) staff — investment — sovereignty — simultaneously c) resources — staff — sovereignty — resources d) investment — resources — staff — simultaneously

Passage excerpt: "Neuroplasticity — the brain's ability to reorganize itself by forming new neural connections — has revolutionized our understanding of brain function. For decades, scientists believed that the brain developed fully by adolescence and could not recover from damage. This view was challenged by the work of neuroscientist Maria Montaldi, who demonstrated in 2003 that the adult brain could generate new neurons in the hippocampus, a region critical for memory. Later research by Dr. Karl Deisseroth introduced optogenetics, a technique that uses light to control neurons that have been genetically modified to express light-sensitive ion channels. This breakthrough has allowed researchers to map neural circuits with unprecedented precision." Match the discoveries to the researchers. a) Maria Montaldi — optogenetics technique for controlling neurons with light b) Dr. Karl Deisseroth — adult brain generates new neurons in the hippocampus c) Maria Montaldi — adult brain can generate new neurons in the hippocampus d) Dr. Karl Deisseroth — the brain cannot recover from damage after adolescence

Passage excerpt: "Electricity is generated in power stations through various methods. In thermal power plants, fuel such as coal, natural gas, or oil is burned to heat water and produce steam, which spins a turbine connected to a generator. In hydroelectric plants, flowing water turns turbines. Wind turbines harness the kinetic energy of moving air, while solar panels convert sunlight directly into electricity using photovoltaic cells. Nuclear power plants generate electricity through nuclear fission, splitting atoms to release heat. Regardless of the method, all power plants operate on the same principle: mechanical energy is converted into electrical energy by a generator. The electricity is then transmitted through power lines to homes and businesses, often at high voltage to reduce energy loss during transmission." According to the passage, what principle is common to all methods of electricity generation? a) They all require flowing water to generate power. b) They all convert mechanical energy into electrical energy using a generator. c) They all produce electricity at low voltage for direct home use. d) They all burn fossil fuels to create steam.

Passage excerpt: "Volcanic eruptions exert influence far beyond their immediate surroundings. When a volcano erupts with sufficient force, it can inject vast quantities of ash and sulfur dioxide gas into the stratosphere, the upper layer of the atmosphere. Sulfur dioxide reacts with water vapor to form sulfate aerosols, tiny reflective particles that can persist for months or even years. These aerosols reflect incoming solar radiation back into space, producing a measurable cooling effect on the Earth's surface. The 1815 eruption of Mount Tambora in Indonesia, the largest volcanic eruption in recorded history, led to the famous year without a summer in 1816, when widespread crop failures and unusually low temperatures affected North America and Europe." Complete the notes below. | Effects of major volcanic eruptions | |---| | Inject ash and ______ into the stratosphere | | Sulfur dioxide forms sulfate ______ | | Aerosols reflect solar radiation, causing ______ | | Tambora eruption (1815) caused 1816's ______ | a) carbon dioxide — droplets — warming — drought b) sulfur dioxide — aerosols — cooling — year without a summer c) nitrogen — particles — heating — flood season d) methane — compounds — stabilization — ice age

Passage excerpt: "Sound travels as mechanical waves through a medium such as air, water, or solids. The speed of sound varies depending on the medium: it travels fastest in solids, slower in liquids, and slowest in gases. In air at room temperature, sound travels at approximately 343 meters per second. The pitch of a sound is determined by its frequency, measured in Hertz (Hz), while the loudness is determined by its amplitude. Humans can typically hear sounds with frequencies between 20 Hz and 20,000 Hz. Sounds below 20 Hz are called infrasound, and those above 20,000 Hz are called ultrasound, which is used in medical imaging and sonar technology." Complete the notes below. | Properties of sound | |---| | Sound travels fastest in ______, slowest in gases | | Speed in air at room temperature: approximately ______ meters per second | | Pitch is determined by ______; loudness by ______ | | Human hearing range: 20 Hz to ______ Hz | a) liquids — 343 — amplitude — frequency — 10,000 b) solids — 343 — frequency — amplitude — 20,000 c) solids — 243 — frequency — amplitude — 20,000 d) gases — 343 — frequency — amplitude — 20,000

Passage excerpt: "The development of 5G technology promises to revolutionize how we connect to the digital world. Operating at higher frequencies than previous generations, 5G networks can transmit data at speeds up to 100 times faster than 4G, with significantly reduced latency. This enables new applications such as autonomous vehicles, remote surgery, and smart cities. However, the higher frequencies used by 5G have shorter ranges than 4G signals, requiring many more antenna towers to be installed in urban areas. This has raised concerns among some communities about potential health effects, although scientific studies to date have found no evidence that 5G radio frequencies cause harm at levels below international safety guidelines." The higher frequencies used by 5G have ______. a) longer ranges than 4G signals b) the same range as 4G signals c) shorter ranges than 4G signals d) no impact on antenna installation