A common answer to that riddle is "a frog." Frogs are typically green, and they are known for their loud croaking sounds, especially during mating season. Another playful interpretation could be a "green fire truck," which would certainly make a loud noise when responding to emergencies.
your engine is loud because, the fan makes that noise
The Tai-me
An elephant
Fruit bats.
well if it makes a pop noise get rid of it fast
Cymbals make loud noise.
The startle reflex.
· An electric bulb has partial vacuum. When broken, air rushes into the void causing a loud noise.
Locust
The Tai-me.
Something wholly unreal
makes a loud noise!! ha