01 · science vocabulary
hypothesis
Definition: a proposed explanation that can be tested
Example: “The class designed a test of the hypothesis.”
topic vocabulary
Science Vocabulary
This topic guide gives you practical science vocabulary for speaking, writing, reading, and listening.
Featured word or expression
hypothesis
Definition: a proposed explanation that can be tested
Example: “The experiment supported the original hypothesis.”
Word forms and grammar
hypothesis (n.), hypotheses (pl.), hypothesize (v.)
Synonyms and close meanings
theory, proposition
Related vocabulary
Learn these words as a connected set, then write one original sentence with each item.
analysisevidencelaboratorymeasurementobserveresearchsamplevariable
Complete learning list
12 words and expressions
Definitions, examples, and audio pronunciation
02 · science vocabulary
variable
Definition: a factor that can change in an investigation
Example: “Temperature was the only variable we changed.”
03 · science vocabulary
sample
Definition: a smaller part selected for examination
Example: “The researcher collected a water sample.”
04 · science vocabulary
evidence
Definition: observations or information used to support a conclusion
Example: “The results provide evidence for the explanation.”
05 · science vocabulary
observe
Definition: to watch or measure something carefully
Example: “Observe the colour change and record the time.”
06 · science vocabulary
measurement
Definition: a value found by comparing something with a unit
Example: “Repeat the measurement to check consistency.”
07 · science vocabulary
experiment
Definition: a planned test used to investigate a question
Example: “The experiment compared two growing conditions.”
08 · science vocabulary
control group
Definition: a comparison group not given the tested treatment
Example: “The control group received no extra light.”
09 · science vocabulary
replicate
Definition: to repeat a study or procedure to check its results
Example: “Another team tried to replicate the experiment.”
10 · science vocabulary
analysis
Definition: careful examination of information or material
Example: “The analysis revealed a pattern in the data.”
11 · science vocabulary
conclusion
Definition: a judgement drawn from evidence and reasoning
Example: “The conclusion should match the results.”
12 · science vocabulary
uncertainty
Definition: the extent to which a result is not precisely known
Example: “The report describes uncertainty in the measurements.”
Quick vocabulary quiz
Which option is closest in meaning to hypothesis?
How to remember and use this vocabulary
Say the featured word aloud, read its definition, and notice its role in the example sentence. Next, connect it to one synonym and one related word. Finally, write a sentence about your own experience. This sequence creates several retrieval paths and makes the vocabulary easier to use spontaneously.
Usage and accuracy
Check the word form before placing vocabulary in a sentence. Nouns, verbs, adjectives, and adverbs occupy different grammatical positions. For phrasal verbs and idioms, learn the entire expression and its typical object pattern. Accurate, natural use is more valuable than forcing advanced vocabulary into every sentence.