A magnet is a material that attracts certain metals. The invisible force of attraction is called ‘magnetism’. It is named after the magnetic rock called ‘lodestone’ or ‘magnetite’.
Kumpulan dan fakta tentang dunia sains, seperti penjelasan bahwa alumunium adalah salah satu logam yang paling ringan, ukuran molekul DNA hanya setebal rambut manusia, dan lain-lain.
Kumpulan dan fakta tentang hewan liar, seperti ular pernah memakan kijang seberat 60 kg, capung memiliki 30.000 lensa terpisah di setiap mata majemuknya, dan lain-lain.
Kumpulan dan fakta tentang batu dan mineral, seperti Gunung Mauna Loa di Hawaii adalah gunung api tertinggi, Berlian Cullinan yang beratnya mencapa 3.106 karat, dan lain-lain.
The American Heritage Children’s Science Dictionary introduces students in grades 4 to 6 to the language and ideas of science. Clear definitions, stunning color art, and an array of special notes and tables cover the full range of scientific subjects, from earth science, computers, weather, and outer space to basic biology, chemistry, physics, medicine, and mathematics.
This series provides a rich resource of information with maximum impact. 1000 facts are covered by 100 topics, each with 10 key points that provide a simple but memorable handle on the subject. Fascinating information panels as well as extended captions amplify this quick-fire approach.