Some people work to save old buildings, objects, and places because they are important to history. They want these things to stay and be safe for a long time. This job started to be popular a long time ago.
People who do this work are called professionals. They are trained to do different things. Some make sure the rules are followed. Others build or fix old buildings. Some work in museums or help make old places in the city look nice again. Each kind of job needs special skills and knowledge.
In the United States, many people working in this job make sure others follow the rules. There are big rules made by the country and little rules made by cities. The rules say that old buildings are special. If someone wants to change an old building, they must ask for permission. This is because the building is important to history.
Cryptocurrency is like digital money. It can be used to buy things through computers. There is no big boss like a government or a bank for this money. Instead, it uses special computer codes to keep it safe and make sure it belongs to the right person.
People who have cryptocurrency, keep it in a digital place called a ledger. This is like a special notebook that records who owns the digital money. This notebook is very safe because of a thing called cryptography.
Cryptocurrency is different from regular money. Sometimes people think it's like gold or shares in a company, but it is really a special kind of thing to own.
Some types of this digital money let people help keep it running. These helpers get some rewards for being part of it. They can get more digital money or other benefits.
This digital money is not like paper money that you can hold. No one person or place makes it or controls it. Many people together help to make it and keep it going.
The first kind of this digital money was called Bitcoin. It started in 2009. Now, there are more than 25,000 different types. Some are very big and worth a lot of money.
Digital money is made and shared in a special way. This way is called blockchain, which is like a big book where all trades are written down.
England is a place with many people and things. It is in the United Kingdom. England is big and has lots of water around it. It touches Scotland and Wales. There are many small islands, too. Lots of people live there, and the biggest city is London. It is also the most important city.
A long time ago, people came to live in England. The name England comes from people called the Angles. They came a very long time ago. England joined together as one place many years ago. It shared its ways of doing things with the whole world. England and Scotland became friends and joined into a bigger place.
England has a special way of talking and has football. It has a special church and a way that it decides what to do as a country. This has helped other places do the same. A long, long time ago, England started using machines for work. It was the first to do this.
There are two very old and special schools in England. They are called universities. One is called Oxford, and the other is called Cambridge. People think these schools are very, very good.
England has many different lands, like hills and flat places. It has many famous things and is very important.