Rainwater picks up carbon dioxide from the air and as it percolates through the soil, which turns into a weak acid. This slowly dissolves out the limestone along the joints, bedding planes and fractures, some of which become enlarged enough to form caves.
Distance divided by time is <u>speed</u><u>.</u>
Explanation:
The distance you travel in a certain amount of time would be your speed.
That’s a dependable variable because it’s relying on something else.
