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15
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How long does it usually take for sedimentary rocks to form?
A few minutes
Millions of years
One day
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Why are sedimentary rocks useful to study Earth’s history?
They are always shiny
They contain layers and fossils
They are very hot
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shark
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rocket
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15
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Why are fossils usually found in sedimentary rocks?
They form in layers gently
They form under extreme heat
They form from lava
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15
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Which rock is a sedimentary rock?
Sandstone
Basalt
Granite
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What causes compaction to happen?
Sunlight
Wind movement
Weight of upper layers
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Which material often acts as natural cement?
Air
Plastic
Minerals
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What process moves sediments from one place to another?
Erosion
Crystallization
Condensation
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What helps glue sediments together?
Freezing
Evaporation
Cementation
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baam
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gift
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15
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Which sedimentary rock forms from sand?
Sandstone
Obsidian
Marble
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What are sediments?
Melted rock inside Earth
Small pieces of rock and other materials
Hot flowing lava
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Which environment often forms sedimentary rocks?
Rivers and seas
Volcanoes
Earth’s core
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What is a sedimentary rock?
A rock formed from lava
A rock formed from sediments
A rock formed by heat and pressure
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How are sedimentary rocks usually arranged?
In crystals
In bubbles
In layers
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