Mineral and Rocks Crossword
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Down:
2) a rating of rocks on a scale of 1-10. 1 being soft - talc and 10 being the hardest - diamond3) How a rock feels, rough or smooth4) a fire-made rock formed from melted rock material. Examples: Basalt, granite5) A mixture of many different materials including tiny rock particles, minerals, silt and decayed plant and animal materials.6) The destruction or discoloring action on resources caused by air, water, or frost, especially on rock or wood. The process that causes rocks to crumble, crack, and break. It can happen by rushing water, strong winds, growing plant roots, and chemicals8) This is the layer just below the top soil. It is made of bigger, lighter colored particles. It does not have humus. It can hold some water and minerals.10) a rock that has changed form through squeezing and heating. Examples: gneiss, marble14) Loose particles of broken rocks, think about the beach!15) The carrying away of weathered materials17) This is the layer that is made of very small, dark particles. It has a lot of humus and minerals and can hold a lot of water. |
Across:
1) Leftover decomposed plant and animal matter. A material that adds nutrients to soil and was once living ,or was formed by a living thing.7) There are hundreds of different kinds of these, they have different properties, light, dark, rough, smooth, heavy, hard, soft.9) This is the color of the mark made by rubbing a mineral across a hard surface, like a bathroom tile11) This is measured by seeing how easy it is to scratch a mineral12) Fossils are found in these rocks! It's a kind of rock formed when sand, mud, peebles at the bottom of rivers, lakes, and oceans pile up. Formed in layers! Examples: limestone, siltstone13) A naturally occuring substance, neither plant nor animal - they are the building blocks or rocks, there are more than 3,000 of them16) How can object reflects light18) A mixture with soil, peat, or fiber base and a balanced nutrient content that is used for growing plants in pots19) A kind of soil that contains clay, sand, silt and humus. Plants grow well in it.20) An earthly material that is plastic when wet and hard when dried or fired. Used for making brick, tile and pottery. |
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