A landmass can be a continent or an island.
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Technology ls another word for applied science.
There is no perfect synonym for the noun continent although it might be less specifically called a "landmass."The adjective continent (austere) might have the synonyms abstinent/abstentious or restrained. In the more specific sense (chaste) it could have synonyms pure, virtuous, or celibate.
Earth science.
In science, another word for state may be phase. For instance a state of matter is also called a phase of matter.
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tools
Biology.
science experiment
synonym
physical features
Some synonyms for 'science project' are assignment or experiment.