A few weeks ago we planted water cress and runner beans to study how plants need soil, heat, light and water. First the soil was carefully poured into cups and after that we made sure the soil was flattened at the top. Soon after the water was poured into the soil to moisten it. Then the cup was put beside the window to ensure that the sun would be able to heat the cup up. All of this was done as preparation before planting the seeds. Then we waited to see if they would grow.