Summarizing Worksheet - Free Printable

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:
- 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.
- 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 harden into stone. Examples: limestone, sandstone.
- Metamorphic rocks form when existing rocks are buried deep underground and changed by heat, pressure, and time. Examples: marble, quartzite.

Key Ideas:
- Rocks are the oldest objects on Earth and constantly change over time.
- The Earth's crust is mostly made of igneous rock.
- Sedimentary rocks form from compacted sediments.
- Metamorphic rocks are transformed from other rock types.
- All rocks can eventually become new rocks through natural processes.

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Final Summary (to write in the box):

Rocks are the oldest things on Earth and are found everywhere—on land, in water, and under soil. There are three main types: igneous, sedimentary, and metamorphic. Igneous rocks form when magma or lava cools and hardens (examples: granite, obsidian). Sedimentary rocks form from layers of sand, mud, and pebbles that build up and harden over time (examples: limestone, sandstone). Metamorphic rocks form when other rocks are changed by heat, pressure, and time deep underground (examples: marble, quartzite). Rocks continuously change and cycle into new forms over long periods, making them eternal and ever-evolving parts of Earth’s structure.