Base your answers to questions 1 and 2 on the diagram below and on your knowledge of science. The diagram shows a controlled experiment designed to test how much time it takes for seeds to germinate under four different conditions. Four bean seeds were placed in each of four pots. Each pot contained 100 cubic centimeters (cm3) of soil. All four pots were placed on the same sunny windowsill. A different amount of water was placed in each pot.

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Soil Ecosystem

Soil provides a habitat or living environment for a large number of different species of organisms as well as plants. It provides all the essential nutrients and minerals for plants to grow. All these together form the soil ecosystem.