What do you call the green thing growing on rocky surfaces where a small amount of water is constantly flowing? - Quora

What causes waterfalls to form? Do they only occur when rivers run into mountains or can they happen in other locations with enough force? - Quora

What live plants can I put in an African Cichlid tank? - Quora

Does liquid water exist below the Martian surface today or has it existed recently (like within the last billion years)? - Quora

What is the reason for the ground water level near a hill to be higher than that of other places? - Quora

Why is green sand only found on one beach in Hawaii? - Quora

Is water freezing in a crack then melting called weathering, erosion, or deposition? - Quora

What are some tips for planting in rocky soil? - Quora

Why does running water look white/clear even though the water is dirty? - Quora

How to tell if a rock is a geode - Quora

Why does the ocean not have algae? - Quora

What are some tips for building a water feature in a pond? - Quora