| A | B |
|---|
| The remains of organisms in soil or rock are called ______. | fossils |
| A ____ is is a unit of time that is measured in millions of years. | era |
| The INORGANIC material found in the ground that is made of elements is called a _______. | mineral |
| This term describes how resistant a mineral is to scratching. | hardness |
| The age of a fossil in years is considered to be its ___________________. | absolute age |
| This is the process when rocks change from one type to another over time. | rock cycle |
| Water is a limited resource. What do we have to do to keep good water for generations to come? | protect the sources, conserve, keep pollution free |
| This is a material that formed from the decay of organisms and is used today as a source of energy. | fossil fuel |
| Granite is formed from magma inside the Earth which makes granite this type of rock. | igneous |
| Geometric shapes that form some rocks are called ______. | crystals |
| The energy that comes from the inside of the earth is called _______________. | geothermal energy |
| These are two nonrenewable resources. | oil & coal |
| When a volcano erupts, what type of rock forms from the lava? | igneous |
| This term describes the way a mineral reflects light. | luster |
| Name two fossil fuels. | natural gas & coal |
| What are the three basic rock types? | sedimentary, igneous, & metamorphic |
| Adding harmful materials to soil, air, or water is called _____________. | pollution |
| Heat and pressure form this type of rock. | metamorphic |
| The remains of ancient organisms in rock is called a ____. | fossil |
| The part of the soil that is made up of decayed organic material is called____. | humus |
| The division of the layers of soil is called __________. | horizons |
| Fossils are usually found in what type of rock? | sedimentary |
| This is made from non living substances in the ground. | minerals |
| An underground body of water is called a(n) | aquifer |
