Question

Define these terms using an appropriate relative pronoun.

1- An aquarium
2- A thermometer
3- An astronomer
4- the equator

Answer 1

Answer:

1 - An aquarium is an artificial habitat for fish and other water animals, which is either a small glass tank or a building.

2 - A thermometer is a small device that measures temperature, especially used to measure human body temperature.

3 - An astronomer  is a person who studies the science of astronomy, especially in the field of space

4 - The equator is an imaginary line that lies around the earth.

Explanation:

Answer 2

Answer:

Thermometer is a small device that used to measure body temperature .