The Big Idea Science Book, 2010

The Big Idea Science Book, 2010.
    
   Watch science come alive on screen with an amazing interactive website created especially for the book. It is bursting with things to explore and do! Fantastic video clips and interactive animations take you inside plants, around the human body, deep below Earth’s surface, and into the depths of space — for an even closer look at science in action!
This unique hands-on experience gives you the chance to apply everything that you have learned and see even more! Click on incredible illustrations to animate scientific processes, watch video clips of real-life science, or test your newly acquired knowledge with fun quizzes.




HUMAN GENOME.
Scientists have put together a puzzle that has more than 3 billion pieces. The puzzle is called the human genome, a full set of all the genetic information in human DNA (deoxyribonucleic acid). Scientists already knew certain things about the puzzle when they began the Human Genome Project in 1989.

They knew where to find DNA—in the nucleus of each human cell, on the structures called chromosomes. They knew what DNA looks like—a twisted ladder, with rungs made of four different chemicals, called nitrogen bases. They learned that DNA can be divided into 20,000 to 25,000 sections, each of which is called a gene. One gene might be made up of anywhere from thousands to millions of bases. To complete the puzzle, scientists had to learn the order, or sequence, of every one of the 3 billion bases. Different groups of scientists have worked on the puzzle, one finishing it in 2001 and another in 2003, and published the sequence of the basic human genome. The challenge now is to find out which human traits, structures, and diseases are influenced by which parts of our amazing genome.

CONTENTS.
Web connections.
How to use this book.
Life Science.
Earth Science.
Physical Science.
Glossary.
Index.
Picture credits.



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