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Formation of Sedimentary rocks

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  • What happens if sediments are not cemented?
    They turn into magma
    They become crystals
    They stay loose
  • Which force presses sediment layers together?
    Light
    Pressure
    Sound
  • What causes compaction to happen?
    Wind movement
    Sunlight
    Weight of upper layers
  • What is deposition?
    Burning of rocks
    Eating of rocks
    Dropping of sediments
  • Why are fossils usually found in sedimentary rocks?
    They form from lava
    They form under extreme heat
    They form in layers gently
  • What helps glue sediments together?
    Cementation
    Freezing
    Evaporation
  • Which step comes last in forming sedimentary rocks?
    Weathering
    Erosion
    Cementation
  • Which process breaks rocks into smaller pieces?
    Eruption
    Melting
    Weathering
  • What is a sedimentary rock?
    A rock formed from sediments
    A rock formed by heat and pressure
    A rock formed from lava
  • Which step comes first in forming sedimentary rocks?
    Weathering
    Cementation
    Compaction
  • Which material often acts as natural cement?
    Plastic
    Air
    Minerals
  • What is cementation?
    Water breaking rocks
    Sediments turning to lava
    Minerals sticking sediments together
  • Where do sediments usually settle?
    Deep inside the mantle
    At the bottom of rivers seas or lakes
    Inside volcanoes
  • What process moves sediments from one place to another?
    Condensation
    Crystallization
    Erosion
  • What do fossils show?
    Volcano locations
    Past living things
    Melted rocks
  • Why are sedimentary rocks useful to study Earth’s history?
    They are very hot
    They are always shiny
    They contain layers and fossils
  • What are sediments?
    Hot flowing lava
    Small pieces of rock and other materials
    Melted rock inside Earth
  • How are sedimentary rocks usually arranged?
    In crystals
    In layers
    In bubbles
  • Which sedimentary rock forms from shells of sea animals?
    Gabbro
    Pumice
    Limestone
  • How long does it usually take for sedimentary rocks to form?
    One day
    Millions of years
    A few minutes
  • Which rock is a sedimentary rock?
    Granite
    Basalt
    Sandstone
  • Which environment often forms sedimentary rocks?
    Rivers and seas
    Earth’s core
    Volcanoes
  • What is compaction?
    Sediments breaking apart
    Sediments melting
    Sediments being pressed together
  • Which sedimentary rock forms from sand?
    Obsidian
    Marble
    Sandstone
  • What happens to sediments after they settle?
    They form layers
    They melt
    They turn into magma
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