Exercise 1
Choose the correct science and research word to complete each sentence.
Example: The team conducted a series of ______ to test their hypothesis. (experiments / inventions / surveys)
Answer: The team conducted a series of experiments to test their hypothesis.
Science and Research Vocabulary
Whether you are reading a peer-reviewed journal, attending a scientific conference, or simply following a breakthrough story in the news, a strong command of science and research vocabulary is essential for any advanced English learner. The language of science is precise, formal, and richly nuanced — and understanding it opens doors to academic study, professional communication, and critical thinking at the highest level.
Setting the Scene
Imagine you are a postgraduate researcher presenting your findings at an international symposium. Your study investigates the long-term effects of microplastics on marine ecosystems. You must articulate your methodology, defend your hypotheses, acknowledge the limitations of your data, and situate your work within the broader empirical literature. Every word you choose carries weight. The vocabulary below will equip you to communicate with precision, authority, and intellectual rigour in any scientific or research context.
Key Vocabulary and Meaning Breakdown
1. The Research Process
These words describe the stages, structures, and methods involved in conducting scientific enquiry.
| Word / Phrase | Part of Speech and Meaning | Example Sentence | Collocations / Notes |
|---|---|---|---|
| hypothesis | noun — a proposed explanation for a phenomenon, made on the basis of limited evidence, used as a starting point for investigation | The team formulated a hypothesis that increased ocean temperatures accelerate coral bleaching. | formulate / propose / test / support / refute a hypothesis; working hypothesis; null hypothesis |
| methodology | noun — the system of methods and principles used in a particular field of study or activity | The paper's methodology was robust, combining quantitative surveys with in-depth qualitative interviews. | research methodology; rigorous / sound / flawed methodology; outline the methodology |
| empirical | adjective — based on observation or experiment rather than theory or pure logic | The empirical evidence gathered over a decade strongly supported the theoretical model. | empirical evidence / data / research / findings; empirically sound |
| peer review | noun — the evaluation of scientific or academic work by others working in the same field | No findings are considered credible in the scientific community until they have undergone rigorous peer review. | subject to / undergo peer review; peer-reviewed journal / article; blind peer review |
| variable | noun — an element, feature, or factor that can be changed or controlled in an experiment | The researchers held all variables constant except for the concentration of the chemical compound. | dependent / independent / confounding variable; control a variable; isolate a variable |
| control group | noun — a group in an experiment that does not receive the experimental treatment, used as a baseline for comparison | Participants in the control group received a placebo, ensuring the results were not distorted by expectation. | assign to a control group; compare with the control group; placebo-controlled |
| replication | noun — the repetition of an experiment or study to confirm its results | A hallmark of good science is that findings are open to replication by independent researchers. | replication of results / findings; independent replication; replication crisis; replicate a study |
| longitudinal | adjective — relating to a study conducted over a long period of time with the same subjects | The longitudinal study tracked the cognitive development of 500 children over fifteen years. | longitudinal study / research / data / analysis; longitudinal cohort |
| randomised controlled trial (RCT) | noun — a type of scientific experiment where participants are randomly assigned to groups, considered the gold standard in clinical research | The drug's efficacy was demonstrated in a large-scale randomised controlled trial involving three countries. | conduct / run an RCT; gold-standard RCT; double-blind randomised controlled trial |
| meta-analysis | noun — a statistical analysis that combines the results of multiple independent studies to arrive at overall conclusions | A meta-analysis of thirty-seven studies concluded that the intervention had a significant positive effect. | conduct / perform a meta-analysis; systematic review and meta-analysis; pooled data |
2. Scientific Evidence and Findings
These terms relate to how evidence is evaluated, described, and communicated within the scientific community.
| Word / Phrase | Part of Speech and Meaning | Example Sentence | Collocations / Notes |
|---|---|---|---|
| corroborate | verb — to confirm or give support to a statement, theory, or finding | The satellite data corroborated the field observations made by the research team. | corroborate a theory / claim / hypothesis / finding; independently corroborated |
| extrapolate | verb — to extend known data or conclusions into an area not directly investigated, often by inference | The scientists were cautious about extrapolating their findings to the wider population without further evidence. | extrapolate from / to; extrapolate data / results / trends; be cautious about extrapolating |
| inconclusive | adjective — not leading to a firm conclusion or definitive result | The initial trials were inconclusive, prompting the team to design a more controlled follow-up experiment. | inconclusive evidence / results / findings; remain inconclusive; prove inconclusive |
| statistically significant | adjective phrase — describing a result unlikely to have occurred by chance, as determined by statistical analysis | The difference between the two groups was statistically significant, with a p-value of less than 0.05. | statistically significant difference / result / effect; reach statistical significance; p-value |
| anomaly | noun — something that deviates from what is standard, normal, or expected | One data point appeared to be an anomaly and was flagged for further investigation. | detect / identify / explain an anomaly; statistical anomaly; anomalous data / result |
| paradigm shift | noun — a fundamental change in the underlying assumptions or framework of a scientific discipline | The discovery of DNA's double-helix structure represented a paradigm shift in our understanding of genetics. | trigger / represent / bring about a paradigm shift; a shift in paradigm; Kuhnian paradigm shift |
| causality | noun — the relationship between cause and effect; the principle that everything has a cause | Establishing causality is far more demanding than demonstrating a mere correlation between two variables. | establish / demonstrate / infer causality; causality vs correlation; causal link / relationship |
| bias | noun — a systematic error or distortion in research design, data collection, or analysis that affects results | Selection bias was a significant limitation of the study, as participants were all drawn from urban settings. | selection / confirmation / publication / reporting bias; introduce bias; minimise / account for bias |
| reproducibility | noun — the ability of an experiment or study to yield the same results when repeated under the same conditions | Concerns about the reproducibility of psychological experiments have led to a broader replication crisis. | ensure / question / improve reproducibility; lack of reproducibility; reproducibility crisis |
| disseminate | verb — to spread or share information, knowledge, or findings widely | Open-access publishing has made it far easier to disseminate scientific findings to a global audience. | disseminate findings / results / information / knowledge; widely disseminated; dissemination of research |
3. Concepts, Theories, and Scientific Thinking
This category covers the higher-order language used to discuss abstract scientific concepts, theoretical frameworks, and modes of reasoning.
| Word / Phrase | Part of Speech and Meaning | Example Sentence | Collocations / Notes |
|---|---|---|---|
| postulate | verb / noun — to suggest or assume something as a basis for reasoning or discussion; a statement assumed to be true | Einstein postulated that the speed of light remains constant regardless of the observer's frame of reference. | postulate a theory / idea / mechanism; as postulated by; basic postulate |
| axiom | noun — a statement or proposition that is regarded as self-evidently true or universally accepted | It is an axiom of scientific enquiry that extraordinary claims require extraordinary evidence. | mathematical / fundamental axiom; accept as an axiom; axiomatic |
| conjecture | noun / verb — an opinion or conclusion formed without sufficient evidence; to propose tentatively | At this early stage, the idea remained a conjecture, lacking the experimental data to be promoted to a theory. | mere conjecture; support / dismiss a conjecture; conjecture that; speculative conjecture |
| infer | verb — to reach a conclusion from evidence and reasoning rather than from explicit statements | From the fossilised remains, palaeontologists inferred that the species lived in shallow coastal waters. | infer from; infer that; reasonable to infer; infer a conclusion / meaning |
| rigour | noun — the quality of being thorough and careful; demanding exactness and precision | The study was widely praised for the intellectual rigour with which the data had been collected and analysed. | scientific / intellectual / methodological rigour; lack rigour; with great rigour; rigorous analysis |
| serendipitous | adjective — occurring by fortunate accident, often leading to an unintended but valuable discovery | The discovery of penicillin was famously serendipitous — Fleming noticed mould killing bacteria purely by chance. | serendipitous discovery / finding; serendipity in science; a serendipitous encounter |
| theoretical framework | noun phrase — a structure of concepts and assumptions that underpins and guides a research project | The study drew on a sociological theoretical framework to interpret the behavioural data. | adopt / apply / develop a theoretical framework; within the theoretical framework of; underpinned by |
| interdisciplinary | adjective — involving or relating to more than one branch of knowledge or academic discipline | Addressing climate change requires an interdisciplinary approach that integrates physics, economics, and social science. | interdisciplinary research / collaboration / approach; across disciplines; multidisciplinary |
| seminal | adjective — strongly influencing later developments; highly original and important | Watson and Crick's seminal paper on the structure of DNA transformed the entire field of molecular biology. | seminal work / paper / study / contribution; widely regarded as seminal; a seminal moment |
| falsifiable | adjective — capable of being proven false through observation or experiment; a key criterion of scientific validity | According to Popper's philosophy of science, a theory must be falsifiable to be considered genuinely scientific. | falsifiable hypothesis / theory / claim; principle of falsifiability; not falsifiable; falsify a hypothesis |
Collocations and Useful Expressions
conduct + research / a study / an experiment
The team conducted groundbreaking research into the genetic markers associated with early-onset dementia.
draw + conclusions / inferences
It is premature to draw firm conclusions from a dataset of this limited size.
yield + results / data / insights
The experiment yielded unexpected results that challenged the prevailing model.
challenge / overturn + assumptions / theories / models
The new data effectively overturned long-held assumptions about the formation of the solar system.
build on / extend + previous research
This paper builds on previous research by incorporating a wider demographic sample.
bridge + the gap
The study attempts to bridge the gap between theoretical models and real-world clinical outcomes.
shed light on + a problem / phenomenon / question
The new imaging technology has shed light on how the brain processes emotional memory.
point to / point towards + evidence / a conclusion
Several independent studies point to a strong link between sleep deprivation and impaired immune function.
account for + findings / data / discrepancies
The authors struggled to account for the anomalous readings in the final dataset.
call into question + validity / reliability / assumptions
The discovery calls into question the validity of models used over the past two decades.
have implications for + science / policy / practice
These findings have far-reaching implications for public health policy across the developing world.
in light of + evidence / findings
In light of the new evidence, the original conclusions must be substantially revised.
Important Differences and Confusing Words
Hypothesis vs Theory vs Law
In everyday English, these words are often used loosely or interchangeably. In science, however, they occupy distinct positions in a hierarchy of knowledge.
- Hypothesis — A testable, specific prediction or proposed explanation based on limited evidence. It is the starting point of investigation. "We hypothesise that elevated CO₂ levels will increase plant growth rates."
- Theory — A well-substantiated, broad explanation supported by extensive empirical evidence and repeated testing. A theory is not a guess — it is a robust framework. "The theory of evolution by natural selection is one of the most thoroughly validated frameworks in all of science."
- Law — A concise, often mathematical description of a consistent and universal pattern observed in nature. It describes what happens but not necessarily why. "Newton's law of universal gravitation describes the force between two masses."
Correlation vs Causality
Correlation refers to a statistical relationship between two variables — when one changes, the other tends to change as well. It says nothing about cause and effect. Causality (or causation) establishes that one variable directly produces or influences another.
- "There is a correlation between ice cream sales and drowning rates — both rise in summer. This does not mean ice cream causes drowning."
- "Smoking causes lung cancer — this causal link has been established through decades of empirical research, not mere correlation."
A common and important phrase: "Correlation does not imply causation."
Quantitative vs Qualitative
- Quantitative research deals with numerical data and statistical analysis. It measures how much or how many. "The quantitative analysis revealed a 23% reduction in inflammation markers."
- Qualitative research deals with non-numerical data — language, observations, experiences, and meanings. It explores why and how. "The qualitative interviews revealed complex emotional responses that the survey data had failed to capture."
Replicate vs Reproduce
These terms are closely related but carry subtle distinctions in research contexts.
- Replicate — to repeat a study using the same methods, materials, and conditions to verify its results. "An independent laboratory attempted to replicate the original experiment."
- Reproduce — to obtain consistent results either by replication or by re-analysing the original data. Some frameworks distinguish the two, but in practice they are often used interchangeably. "The findings could not be reproduced, raising serious questions about their validity."
Common Mistakes
❌ The scientist made a hypothesis that temperature affects enzyme activity.
✅ The scientist formulated / proposed a hypothesis that temperature affects enzyme activity.
Note: We do not "make" a hypothesis. Use formulate, propose, or put forward.
❌ The results were very significant.
✅ The results were statistically significant.
Note: In scientific writing, "significant" on its own is vague. Specify "statistically significant" to convey its precise meaning, and ideally include the p-value.
❌ Because A and B are correlated, A must cause B.
✅ Although A and B are correlated, this does not establish that A causes B.
Note: Conflating correlation with causality is one of the most common errors in both scientific writing and public discourse. Always distinguish the two carefully.
❌ The experiment was not reproducible because we did not have the same equipments.
✅ The experiment was not reproducible because we did not have the same equipment.
Note: "Equipment" is an uncountable noun in English and never takes a plural -s.
❌ Evolution is just a theory, so it might not be true.
✅ Evolution is a scientific theory, meaning it is a well-substantiated explanation supported by extensive empirical evidence.
Note: In scientific usage, "theory" does not mean a guess or speculation. Misusing this term significantly undermines scientific literacy.
❌ The researches showed that sleep deprivation impairs cognitive function.
✅ The research showed that sleep deprivation impairs cognitive function.
Note: "Research" is typically an uncountable noun in academic English. Say "the research," "a body of research," or "several studies," not "researches."
❌ We can imply from the data that sea levels are rising.
✅ We can infer from the data that sea levels are rising.
Note: To infer means to draw a conclusion from evidence. To imply means to suggest something without stating it directly. Researchers infer — data implies.
Science and Research Vocabulary: Quick Summary and Review
In this lesson, you have explored the sophisticated language used in scientific enquiry and academic research. Here is a concise summary of the key areas covered:
- The Research Process: Words such as hypothesis, methodology, empirical, peer review, variable, and longitudinal describe the structures and stages of rigorous scientific investigation.
- Evidence and Findings: Terms like corroborate, extrapolate, statistically significant, paradigm shift, and disseminate allow you to discuss and evaluate research outcomes with precision and authority.
- Scientific Thinking: Vocabulary such as postulate, axiom, falsifiable, serendipitous, interdisciplinary, and seminal helps you engage with higher-order intellectual and theoretical discourse.
- Critical Distinctions: Understanding the differences between hypothesis / theory / law, correlation / causality, and quantitative / qualitative is fundamental to academic credibility.
- Common Errors: Avoid treating "research" as countable, confusing "infer" with "imply," and — crucially — never confuse correlation with causation.
Mastery of science and research vocabulary will not only enhance your academic writing and reading comprehension, but also sharpen your ability to think critically about evidence, evaluate claims, and engage confidently in professional and scholarly discourse.
Now practise science and research vocabulary in the exercises below.
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