WordNet® is a large lexical database of English. Nouns, verbs, adjectives and adverbs are grouped into sets of cognitive synonyms (synsets), each expressing a distinct concept.
"When children work on science projects, experiments, investigations, or other science activities their curiosity can be stimulated by asking questions. This helps children develop a better understanding of science concepts. Questioning is part of the attributes of inquiry-based science and central to critical thinking."