Fireworks are a kind of explosion that is designed to explode into a specific pretty pattern and nice colours. At special events, there are usually big displays of lots of different fireworks.
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Fish live underwater, in either salt or fresh water. They can only breathe underwater, but they use gills to breathe, not lungs like we do. Fish are covered in scales. Some people keep very small fish in their houses as pets. The biggest kind of fish is a whale shark, which is just a really big kind of shark. Whales grow a lot bigger than sharks but they are not fish, as they don't have gills and have to come to the surface of the water to breathe, just like we do.
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.
Fis forFishing rod
A fishing rod, or fishing pole, is a tool used to catch fish. It uses a weighted line with a baited hook. When fish eat the bait they get caught by the hook, and the fisher reels them in using the handle you can see in the picture.
Fishing rods are usually used by people who fish for sport or as a hobby, commercial fishing is done using nets.
A fissure is a relatively deep, narrow hole in something. Some fissures are natural features of things, others are caused by external damage.
You fix, mend or repair something if it is broken and doesn't work. Fixing it will make it work again, or make it look as good as new. Not everything that is broken can be fixed.