Something people do for a long time. Sentence: It is a _____ to celebrate the New Year.
tradition
Very old. Sentence: We studied _____ Egypt in class.
ancient
A natural substance from the Earth. Sentence: Salt is a _____.
mineral
A person who studies old objects. Sentence: The ______found ancient tools.
archaeologist
A building to remember something. Sentence: The ____ shows the history of the war.
monument
A group of people with culture and government. Sentence: Ancient _______ built cities.
civilization
A dry area with little water. Sentence: Few plants grow in the ____.
desert
The world around us. Sentence: We should protect the ____.
environment
When the environment becomes dirty. Sentence: Factories can cause ______.
pollution
The usual weather in a place. Sentence: Japan has a mild ______.
climate