Mineral and Rocks Crossword
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Down:
1) A mixture with soil, peat, or fiber base and a balanced nutrient content that is used for growing plants in pots2) This is the color of the mark made by rubbing a mineral across a hard surface, like a bathroom tile3) Leftover decomposed plant and animal matter. A material that adds nutrients to soil and was once living ,or was formed by a living thing.5) There are hundreds of different kinds of these, they have different properties, light, dark, rough, smooth, heavy, hard, soft.6) An earthly material that is plastic when wet and hard when dried or fired. Used for making brick, tile and pottery.8) 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, siltstone9) 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 chemicals11) 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.13) A naturally occuring substance, neither plant nor animal - they are the building blocks or rocks, there are more than 3,000 of them14) This is measured by seeing how easy it is to scratch a mineral18) A mixture of many different materials including tiny rock particles, minerals, silt and decayed plant and animal materials. |
Across:
2) Loose particles of broken rocks, think about the beach!4) a fire-made rock formed from melted rock material. Examples: Basalt, granite7) 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 kind of soil that contains clay, sand, silt and humus. Plants grow well in it.12) a rating of rocks on a scale of 1-10. 1 being soft - talc and 10 being the hardest - diamond15) a rock that has changed form through squeezing and heating. Examples: gneiss, marble16) How a rock feels, rough or smooth17) How can object reflects light19) The carrying away of weathered materials |
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