| A | B |
|---|
| sedimentary rock | the rock that most likely holds a fossil |
| millions of years | the time it takes to form fossil fuels like gas and coal |
| topsoil | the upper most layer of soil that is good for plants |
| igneous rock | rock formed after melted rock cools and hardens |
| fuel | cars, buses, and airplanes need this to work |
| minerals | these form rocks |
| fossil | the remains of plants or animals from long ago |
| natural resources | anything we use from nature like soil, rocks, and water |
| amber | hardened tree sap |
| metamorphic rock | rock that is formed due to squeezing and heat |
| color, shape, texture | property that is used to describe and identify rocks |
| chalk | soft rock use to write |
| humus | part of soil that was once living or was formed by living things |
| soil | mixture of small rocks, sand, minerals, silt |
| loam | mixture of clay and sand |
| sand | small particles of rock |
