Dis forDoor casing
A doorbell is a device usually on the front door of a house that makes a sound when you press a button. People have doorbells so they can hear if someone is at their door, as a doorbell is often louder than a knock.
Something similar to a doorbell is a doorknocker.
Dis forDoorknocker
A doorknocker is a device attached to the outside of entry doors. Doorknockers are used to make a much louder knocking sound than you could make with your bare hands. Doorknockers are often quite ornate, and are often made in the shape of animal or human faces.
Something similar to a doorknocker is a doorbell.
A fish tank is a glass container you keep pet fish in. You can also keep turtles, hermit crabs or even mice, lizards, frogs and snakes in a fishtank.
Obviously, if you are keeping land animals in a fish tank you don't fill it with water, you put dirt in the bottom and grow plants. A fishtank with plants in it is often called a vivarium. You usually keep mice in a fishtank with sawdust at the bottom instead of dirt, so you can regularly change the sawdust to keep it clean.
