Matching. Read the information below. Then match each word in red with its definition.
Crop circles have been seen in the U.K., Australia, Russia, and about 50 other countries. But how—and for what purpose—are they made? A family in a quiet farmland area wakes up one morning to find something very unusual: someone has cut strange shapes into their crop fields! These huge designs are called crop circles. There are circles, stars, even images of animals. But where do these crop circles come from?
Some people think that UFOs make crop circles when they land in fields. Others say they are made by aliens from space, but no one knows the purpose.
Another—more realistic—idea is that some people decide to build crop circles as a hobby, or as a kind of art. The technology to make crop circles is very simple—just a rope and a piece of wood. Some teachers and students have built crop circles for fun.
Crop circles are real—there are photographs and reports of about 12,000 of them. But more research is needed before we really know how and why these shapes are made.