Soldiers often wear clothing that camouflages them. A chameleon is a type of lizard. Chameleons have long, sticky tongues for catching bugs. They can change color to warm up or cool off, and to camouflage themselves. Chameleons also change color when they are angry or scared.
Chameleons can move one eye without moving the other.
This makes it easy for them to keep track of their surroundings. An equation shows that two things are equal. A horizontal line is completely flat. You might think of the line catching an axis, as if it were intercepting a ball. When two lines cross each other, we say that they intersect.