Ko ngā tōpana kei te mata o tētahi wē i rō ipuipu, ānō nei he kiri roroha. Nā te renarena mata e kōpapa ai te āhua o te mata o te wē. Ka kīia ko te mata kōpapa (RP 2009:369). / The forces at the surface of a liquid in a tube that make it behave as though it is an elastic skin. Surface tension results in a concave surface which is called a meniscus (RP 2009:369).

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