| A | B |
|---|
| decay | To slowly break down, or rot |
| humus | the decayed matter in soil.it gives soil a dark color and adds nutrients to the soil. |
| nutrients | a material that plants and animals need to live and grow. |
| clay soil | tightly packed soil with tiny grains. it has many nutrients and holds water well. Many plants cannot grow in this soil because the grains are so close together. |
| sandy soil | loose soil with large grains that do not hold water, and have few nutrients. |
| loam | good planting soil that is a mixture of clay, sand and humus. It holds water and many nutrients for plants. |
| ores | rock that is rich in useful minerals. people separate the minerals from the rocks. |
| natural resource | something in nature that is useful to people. examples: soil, trees, copper, plants, iron, and many more. |
| recycle | to use again in some way or to change something so it can be used again and again. |
| copper | a metal found in ore used to make batteries and some kind of pipes. |
| silver | a metal found in ore used to make film , jewerly, and mirrors. |
| lead | a metal found in ore used to make batteries and some kind of pipes. |
| fuel | anything that is burned to make heat or to make power for running machines. |
| petroleum | a liquid that is found in the earth, often called oil. it can be used to make electricity, ink, plastic, medicines, gasolines, and some clothing. |
| coal | a black or brown rock that can be burned to give off heat and is used to make electricity and steel. |
| mining | the way many resources are taken from underground. |
| derrick | a steel tower that holds the drilling equipment used to drill for oil. |
| oil rig | a large platform used as a base for drilling for oil under the sea or under the ground. |
| refinery | a factory where oil or other raw materials are made pure or changed into useful products. |
| lumbering | the cutting of trees and preparing of logs for sale. |
