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Formation of Sedimentary rocks

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