Question

stripes of colored rock make the “wave” even more unusual.
the stripes of this “wave” are made of colored rock.
wave rock was formed almost 3 billion years ago. its shape is unusual because the face of the rock is rounded into a curve. this is because wind and water wore down the front of the rock. this happened over millions of years.
complete the chart. what does “face” mean in this passage?

Explanation:

The context clue "front" helps determine the meaning. In the sentence "the face of the rock is rounded into a curve" and "wind and water wore down the front of the rock", it implies that "face" here refers to the outward side (as the front is an outward - facing part) of the rock.

Answer:

the outward side of something