minerals, rocks, and soil

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Author:
mariemoon
ID:
263255
Filename:
minerals, rocks, and soil
Updated:
2014-02-21 20:56:55
Tags:
minerals rocks soil
Folders:
fourth grade
Description:
minerals, rocks, and soil
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  1. a material found in the Earth's crust that helps to make rocks
    minerals
  2. the movement of rock from one place to another - water, wind and glaciers can cause this
    erosion
  3. the slow breaking down of rocks in to smaller pieces.
    weathering
  4. the loose material on top of the Earth's surface where most plants grow - dirt
    soil
  5. rich, dark soil formed from dead plants and animals that have rotted away
    humus
  6. the hardened remains or prints of plants and animals that lived over 10,000 years ago
    fossil
  7. the way in which rocks change from one form into another - happens very slowly but never ends
    rock cycle
  8. when particles carried by water, ice, or wind are deposited (dropped) in another location
    deposition
  9. a rock formed from layers of sand, silt, dead plants and dead animals - often contains fossils
    sedimentary rock
  10. a rock that forms from melted rock such as magma that cools and hardens
    igneous rock
  11. a rock that forms from other rocks that are changed by heat and pressure underground
    metamorphic rock
  12. a natural, nonliving substance that makes up rock-the building blocks of rocks
    minerals
  13. a characteristic that describes something
    property
  14. what are four properties of minerals?
    color, hardness, luster, and streak
  15. Can color alone identify minerals?
    No because many minerals are the same color.
  16. a property that refers to a mineral's ability to scratch another mineral or be scratched by another mineral.
    hardness
  17. what scale shows the hardness of a few common minerals?
    Mohs scale
  18. refers to the way light bounces off the surface of a mineral
    luster
  19. the color of powder left behind when you scratch a mineral along a white tile.
    streak
  20. Is a streak always the same color as the minerals surface when scratched?
    No, it can be different.
  21. tiny bits of rock or once-living animals or plants
    sediment
  22. when a rock contains clumps of pebbles and bits of rock, it contains
    sediment
  23. where does sedimentary rock form?
    where sediment is carried and dropped, often at bottoms of rivers, lakes, and oceans
  24. over time sediment becomes cemented together and forms what?
    rock
  25. refers to the size of a rock's particles
    texture
  26. a rock's texture is related to what?
    the size of its mineral grains
  27. caused by a chemical reaction (bubbling)
    between calcite and an acid
    effervescence
  28. what is soil made up of?
    rocks, minerals, water, air, and living things
  29. nonliving plant or animal matter
    humus
  30. this has nutrients for new plants to grow, which makes living things renew the soil year after year.
    humus
  31. soil forms in layers called what
    horizons
  32. The A horizon, which is at the surface, is what?
    topsoil
  33. the layer of soil which is just under the top soil
    B horizon or subsoil
  34. this horizon is above bedrock and below subsoil.
    C horizon
  35. this is at the bottom of most profiles of soil
    bedrock

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