Summary of "Rocks of the Earth"
Who: Rocks (the oldest things on Earth)
What: Rocks are categorized into three main types: igneous, sedimentary, and metamorphic.
Where: Rocks are found everywhere—on land, in oceans, lakes, under soil, and in cities and countryside.
When: Rocks have existed for billions of years and continue to change over time.
How: Rocks form through different processes:
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Igneous rocks form when magma (molten rock inside Earth) cools and hardens. When magma reaches the surface as lava, it also cools to form igneous rocks. Examples: granite, obsidian.
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Sedimentary rocks form from layers of sand, mud, and pebbles that settle at the bottom of lakes and seas. Over time, these layers are pressed together and hardened into stone. Examples: limestone (from shells), sandstone (with visible sand grains).
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Metamorphic rocks form when existing rocks are buried deep underground and changed by heat, pressure, and time. Examples: marble, quartzite.
Rocks are constantly changing and transforming into new types over time, making them eternal and dynamic parts of Earth’s crust.
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Underlined Key Words and Phrases (as per directions):
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oldest things on the planet
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rocks
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cover the whole earth
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cities, country, oceans, lakes, under soil
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earth’s crust
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igneous rock
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magma
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lava
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cools and hardens
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granite, obsidian
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sedimentary rock
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layers of sand, mud, pebbles
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bottoms of lakes and seas
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pressed together
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hardened and became stone
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limestone, sandstone
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metamorphic rock
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began as other rocks
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buried deep in ground
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time, heat, pressure
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marble, quartzite
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Rocks live forever
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oldest objects
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change to become new rocks over time
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Final Summary (Written in the Box):
Rocks are the oldest things on Earth and are found everywhere—on land, in water, and under soil. The Earth’s crust is mostly made of
igneous rock, which forms when
magma cools and hardens. If magma reaches the surface as
lava, it also becomes igneous rock. Examples include
granite and
obsidian.
Another type is
sedimentary rock, formed from layers of
sand, mud, and pebbles that settle in lakes and seas, then get pressed together over time. Examples are
limestone and
sandstone.
The third type is
metamorphic rock, which forms when other rocks are buried deep underground and changed by
heat, pressure, and time. Examples include
marble and
quartzite.
Rocks are not static—they continuously change over time, forming new rocks, making them eternal and ever-evolving parts of our planet.
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✔ This summary answers all the main questions:
who (rocks),
what (types and formation),
where (everywhere),
when (over long periods), and
how (through natural processes like cooling, pressure, and transformation).
Parent Tip: Review the logic above to help your child master the concept of summarizing worksheet.
