This is my ecosystem. The top part is dirt with plants. The bottom is water and a snail is in it. The two parts are connected, just like in real life. The land or dirt part can soak up water from the sky and then it might fall through and go into the water part. Look at the picture below you will see my snail Jr.
I've had my ecosystem for about two weeks and four days. It's changed. The plants at the top got bigger and the water got dirtier. My snail has moved.
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