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Formation of Sedimentary rocks

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