GED Science Practice

Which part of the eye is the cornea?

1. space object made of dust and rock particles mixed with frozen water

2. transparent anterior portion of the outer covering of the eye

3. the weaking of metal

4. the process of changing from a gaseous to a liquid or solid state

The correct answer is: transparent anterior portion of the outer covering of the eye

The cornea is indeed the transparent anterior portion of the outer covering of the eye. It serves several critical functions, including allowing light to enter the eye and contributing to the eye's overall focus. The cornea is made up of several layers and is crucial for clear vision. Its transparency is vital because light must pass through it to reach the retina at the back of the eye, where images are processed. The other options do not relate to the anatomy of the eye. For example, a space object made of dust and rock particles mixed with frozen water describes a comet or asteroid, while the weakening of metal pertains to material science and structural integrity. Lastly, the process of changing from a gaseous to a liquid or solid state refers to phase transitions in matter, which is unrelated to the function and structure of the eye.