4th Grade science Unit 5&6 flashcards

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bdoering
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225149
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4th Grade science Unit 5&6 flashcards
Updated:
2013-06-26 20:51:25
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Science unit
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The flashcards to study for science test unit 5 & 6
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  1. Rock that has been changed by heat, by pressure, or by both.
    Metamorphic Rock
  2. A process by which rocks are changed from one type into another.
    Rock cycle
  3. The age of something compared with the age of another thing.
    relative age
  4. Hardened tree sap, often a source of insect fossils.
    amber
  5. Rock formed when bits or layer of rocks are cemented together.
    sedimentary rock
  6. Formed or shaped within a mold.
    cast
  7. A fossil created by a print or impression.
    imprint
  8. A naturally occurring substance that is neither plant nor animal.
    mineral
  9. "Fire-made" rock formed from hot, molten rock material.
    Igneous rock
  10. A hollow fossil form clearly showing the outside features of the organism.
    Mold
  11. Soil =
    Tiny rocks+minerals+humus+water+air
  12. Left over decomposed plant and animal matter.
    Humus
  13. The rate at which water can pass through porous material.
    permeability
  14. A large mass of snow and ice that moves over land.
    glacier
  15. A vertical section of soil from the surface down to bedrock.
    soil profile
  16. A layer of soil that is different from the layers above and below it.
    Horizon
  17. A break in Earth's outer layer caused by the movement of rocks.
    fault
  18. A movement or vibration in the Earth.
    earthquake
  19. True or false
    All rocks are made of minerals.
    True
  20. True of false
    Rocks come in different shapes, colors, and sizes.
    True
  21. True of false
    A rock is always made up of just one kind of mineral.
    Fales
  22. True or false
    Scientists who study the physical properties of rocks are called geologists.
    True
  23. In what type of rock are most fossils found?
    sedimentary rocks
  24. What part of an animal's body is less likely to become a fossil?
    the skin
  25. What happens when wood or bones become petrified?
    The once-living parts are filled in by minerals.
  26. What are three properties used to identify minerals.
    Hardness, streak, and luster.
  27. The building blocks of rocks are...
    minerals
  28. The way light bounces off minerals is called...
    luster
  29. Words like older, oldest, younger, and youngest are used to describe each rocks'...
    relative age
  30. Sedimentary rocks can help us learn about Earth's past because they may contain fossils and they are laid down in...
    Time order
  31. A word that means "turned to stone" is...
    petrified
  32. A place in which animals got stuck and their bones were preserved as material around them hardened is a...
    Tar pit
  33. Molten material below Earth's surface is called...
    Magma
  34. Energy released as vibrations caused by rocks along fault lines moving and breaking are called...
    seismic waves
  35. The solid rock that makes up Earth's outermost layer is the...
    Crust
  36. The space between soil particles is called...
    Pore space
  37. The layer of rock lying below the crust is the...
    mantle
  38. Glaciers form when...
    More snow falls in winter than melts in summer.
  39. What causes a glacier to move?
    The glacier begins to melt and the water runs downhill.
  40. About how long does it take for one inch of soil to form?
    Hundreds to thousands of years.
  41. In what direction do seismic waves travel?
    In all directions.
  42. An unsorted mixture of rock materials deposited as a glacier melts is called...
    Glacial till
  43. Glaciers have changed the Earth by flattening and rounding the land and creating...
    Valleys
  44. The solid rock layer which is broken apart into small rock pieces and minerals to form soil is called...
    Bedrock
  45. Rich in humus and minerals the top layer of soil is called...
    Topsoil
  46. A liquid layer of Earth lying below the mantle is the
    outer core
  47. A sphere of solid material at Earth's center is the..
    Inner core
  48. Scientists study earthquakes so they can learn about the inside of Earth and to...
    Predict when they will happen.
  49. Gravel, sand, and clay carried from glaciers by melting water and streams form...
    Outwash plains
  50. The end or outer margin of a glacier is the glacier's...
    terminus
  51. Rock debris carried and deposited by a glacier is called..
    moraine
  52. Isolated boulders left behind by a glacier is called...
    Erratics
  53. Name the 3 main groups of rocks...
    • Igneous
    • Sedimentary
    • Metamorphic
  54. Name three causes of erosion...
    wind, waves, glaciers, running water (rivers, streams), gravity, freezing and thawing, bacteria, fungi, chemical change, plants, animals...

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