groundwater

"My grandmother is well and enjoying her retirement. "

"I got a letter from my brother."

"My sister brought several books to the library, and that one is about dinosaurs. "

"My family and I are planning a trip to explore Earth's diverse landscapes. "

"My brother uses the underground to get to work every day. "

"The smooth surface of the kitchen table was perfect for setting the dinner plates. "

""We hiked along the mountain trail and crossed several clear streams." "

"The water in the well came from an aquifer."

"The books were stacked neatly beneath the desk. "

"Simple: "Life exists on Earth." Slightly more specific, but still easy to understand: "My old school still exists, even though it's been remodeled." "

"The farmer was proud of his cow's latest gets, two healthy and strong calves. "

"By the action of electricity, the water was resolved into its two parts, oxygen and hydrogen."