Soil Science and Environmental Materials

Yes, paper is made from the pulp of trees trunk. To make paper, trees are first cut down and then made in to  logs. The logs are cut in to smaller chips and turned in to special kind of pulp. The pulp mixture is then poured out and create the sheets.

Plastic is a group of synthetic or natural organic materials that may be shaped. It can be changed its shape. These days so many things can be made plastics. It is the most hazardous material on the earth as it is non biodegarble and cannot be easily mix in the soil.

Fertilizer refers to products added to a plant’s soil or sometimes sprayed onto its leaves which are supposed to help the plant to get all of the nutrients it needs to grow big and strong. Fertilizer is rich in Nitrogen, which is the main component for the the growth of the plant.

Bed rock is the bottom layer which is made up of solid rocks. This is the hardest layer of soil.

Humus is made up of rotten leaves and decayed bodies of the plants and animals.  It is present in the loam and makes this soil best for the growth of the plants.

Radha's experiment shows that the soil contains moisture, because when the soil is heated up, the moisture in the soil starts evaporating from the soil in the form of steam, but as the container was covered with the lid it started collecting under the lid.

This is right answer as loam is best for the growth of the plant,  top soil is the place where roots of the plants lies,Sub soil is the layer below the top soil and bed rock is the hardest layer of the soil.

This is right options and all options are correctlymatched. Clay is used for making pots and toys as it has very smooth texture, sand is mostly found in deserts, loam is best for the growth of the plant because this layer contains humus, and gravel does not hold water as it is very loosly packed soil.

Humus is the organic part of the soil because soil is made of rotten leaves and decayed bodies of plants and animals. Humus increases the soil fertility.

Natural rubber is obtained from the milky secretion called latex of rubber plant.This milky secretion is first collected by cutting the bark of the plant and later it is used for various purposes like making tyres, eraser , etc.