◎◎◎ laugh ⪢⪢
_____ is the sound made when someone is happy or a funny thing occurs.
http://qindex.info/i.php?x=9989

○○○ fertilization ⪢⪢
Together _____ may occur, organ systems form and a child is born.
http://qindex.info/i.php?x=10956

○○○ worth ⪢⪢
In 1986, an accident occurred at the Chernobyl nuclear reactor plant of Ukraine. That took 30 human lives and damaged property worth around 7 billion dollars. #bookmark
http://qindex.info/i.php?x=10440

○○○ epoch ⪢⪢
This era is made of smaller stages called epochs that occurred within the universe's first tens of thousands of years. #astronomy
http://qindex.info/i.php?x=16146

○○○ swing ⪢⪢
Debt swings occur in two big cycles. One takes about 5 to 8 years and the other takes about 75 to 100 years. While most people feel the swings, they typically don't see them as cycles because they see them too up close - day by day, week by week. #economy
http://qindex.info/i.php?x=19907

• Introduction to Minerals
○ 5 citeria: solid, naturally occurring, inorganic, fixed chemical formula, specific atomic arrangement -- igneous, granite, speckle, quartz, biotite mica, plagioclase feldspar, fluorite, talc, selenite gypsum, pyrite, silicate, bituminous, sulfur, halite
http://qindex.info/i.php?x=4013

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