A student plants pea seeds in 3 identical pots. Each pot contains 43 seeds. The first pot contains potting soil, the second contains clay, and the third contains sand. The seeds are given the same amount of water and sunlight for 3 weeks. What is the dependent variable in this experiment?

Mars and earth have quite a few things in common. both are  terrestrial planets, both are located within the sun’s  habitable zone, both have  polar ice caps, similarly  tilted axes, and similar  variations in temperature. and according to some of the latest scientific data obtained by rovers and atmospheric probes, it is now known that mars once had a  dense atmosphere  and was covered with  warm, flowing water.