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Buy the book here: http://www.chroniclebooks.com/titles/kids-teens/subject/animals-science/a-rock-is-lively.htmlFrom the award-winning creators of An Egg Is Quiet, A Seed Is Sleepy, and A Butterfly Is Patient comes a gorgeous and informative introduction to the fascinating world of rocks. From dazzling blue lapis lazuli to volcanic snowflake obsidian, an incredible variety of rocks are showcased in all their splendor. Poetic in voice and elegant in design, this book introduces an array of facts, making it equally perfect for classroom sharing and family reading.
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Geode
Snowflake Obsidian
Depending on what type of rock it is,
a rock melts at temperatures between
1,300 and 2,400 degrees Fahrenheit
(700 and 1,300 degrees Celsius).
COMETS are balls of rock and ice—
sometimes called “dirty snowballs”—that are
heated by the sun and soar through space,
leaving glowing ribbons of dust behind them.
Asteroid
Meteoroid
Comet
METEOROIDS are rocks that range in size
from a grain of sand to a basketball. These
“shooting stars” streak through space and some-
times slam into the moon, Earth, and other planets,
breaking into fragments known as meteorites.
ASTEROIDS are gigantic chunks of
rocks and metal. They can weigh millions
of tons. The largest known asteroid is
650 miles (1,050 kilometers) in diameter.
It would take a person 352 hours,
or nearly 14 days, to walk around it.
The oldest known rocks on Earth were
formed billions of years before the sky
turned from green to blue, before dinosaurs
thundered across the earth, before humans
learned how to make fire. The oldest rocks
ever found are nearly 4.5 billion years old.
METEORITE FRAGMENTAlgeria,
4.4 billion years old
GREENSTONECanada,
4.28 billion years old
ZIRCON CRYSTALAustralia,
4.1 billion years old
LEWISIAN GNEISSScotland,
3 billion years old
GRANITEUnited States,
2.5 billion years old
The carpets of sand on the floors and shores of
oceans, lakes, and rivers come from larger rocks that
have been ground, through weathering, into tiny grains.
Considered by many to be the world’s largest rock, Australia’s
Mount Augustus is a sandstone rock with an elevation, or height,
of 3,628 feet (1,106 meters) above sea level—about 1,000 feet (305 meters)
higher than the world’s tallest skyscraper.