If three 30cm lengths of glass tubing are tightly packed with clay, sand and loamy...

Explanation

Three 30cm lengths of glass tubing are tightly packed with different types of soil (clay, sand, and loamy soil) respectively and stood in a beaker of water for one week. The question is asking what will happen to the level of water in the tubes after one week. The options are: lowest in the tube with clay, the same in all the tubes, lowest in the tube with loamy soil, highest in the tube with sandy soil, and lowest in the tube with sandy soil (which is the correct option). When soil is packed tightly in a tube, it creates small spaces or pores between the soil particles. The size of these spaces varies depending on the type of soil. Sandy soil has larger spaces between particles, whereas clay has smaller spaces. Loamy soil is a mix of sand, silt, and clay and has medium-sized spaces. When the tubes are stood in a beaker of water, the water will move up the tubes through the spaces between the soil particles. However, because the size of the spaces varies between the different types of soil, the rate of water movement will also vary. Since sand has larger spaces between particles, water will move up the tube with sandy soil the fastest, resulting in the highest water level in that tube. On the other hand, clay has smaller spaces between particles, so water will move up the tube with clay the slowest, resulting in the lowest water level in that tube. Loamy soil has medium-sized spaces, so the water level in the tube with loamy soil will be in between the water levels of the tubes with clay and sand. Therefore, the correct option is D, lowest in the tube with sandy soil.