Question

Define these terms using an appropriate relative pronoun. 1- An aquarium 2- A thermeter
3- An astronomer 4- the equator

Answer 1

$1. \: aquarium \: is \: a \: tank \: or \: pool \: \\ filled \: with \: water \: for \: keeping \: \\ fish \: and \: underwater \: animals. \: \\ 2. \: thermometer \: is \: a \: instrument \: \\ for \: measuring \: temperature. \\ 3. \: astronomer \: is \: a \: physicist \: who \\ studies \: astronom \\ 4.equator \: is \: a \: line \: notionally \: \\ drawn \: on \: the \: planet \: which \\ divides \: planat \: into \: two \: equal \: parts \: or \: poles$