សិល្បៈ
សម្រស់ និង សុខុមាលភាព
សិប្បកម្ម
វប្បធម៌ និង ប្រវត្តិសាស្ត្រ
ការកម្សាន្ត
បរិស្ថាន
ម្ហូប និង ភេសជ្ជៈ
អនាគតបៃតង
វិស្វកម្មបញ្ច្រាស
វិទ្យាសាស្ត្រ
កីឡា
បច្ចេកវិទ្យា
ប្រដាប់ដែលស្លៀក
បុរាណ
120 ប្លង់មាន
ប្លង់ (120)
Hazardous content
Alloying Steel from Iron and Carbon — The Metal That Built the Modern World
by Mary
Metalworking
2
0
0
0
4
0
Hazardous content
Alloying Brass from Copper and Zinc — The Golden Metal That Is Neither Gold Nor Bronze
by Mary
Ancient
0
0
0
0
6
0
Building a Box Bellows — The Breath That Makes Metal Obey Fire
by Emma
Ancient
1
0
0
0
12
0
Making Soda-Lime Glass from Raw Materials — The Recipe That Has Not Changed in 5,000 Years
by Mary
Glassworking
2
0
0
0
10
0
Understanding Oxygen Through Combustion — The Element That Makes Fire Breathe
by Peter
Raw Materials
6
0
0
0
0
0
Generating Hydrogen Gas from Acid and Metal — The Lightest Element in the Universe
by Peter
Chemistry
5
0
0
0
1
0
Understanding Carbon Through Charcoal Making — The Element of Life and Fire
by Peter
Chemistry
6
0
0
0
2
0
Recovering Magnesium Salts from Seawater — The Lightweight Metal That Burns White
by Peter
Chemistry
11
0
0
0
1
0
Growing Saltpeter from Niter Beds — The Explosive Element in Every Living Thing
by Peter
Raw Materials
11
0
0
0
1
0
Recognizing Silicon in Nature — From Flint Nodules to Quartz Crystals
by Peter
Periodic Table
6
0
0
0
4
0
Burning Quicklime from Limestone — The Element That Built Civilization
by Peter
Chemistry
5
0
0
0
5
0
Extracting Potash from Wood Ash — The Alkali Element Hidden in Every Fire
by Peter
Chemistry
6
0
0
0
5
0
Understanding Tellurium from Calaverite — The Rarest Stable Metalloid from Gold Ore
by Peter
Periodic Table
1
0
0
0
1
0
Understanding Zirconium from Zircon — The Ancient Gemstone That Clocks Earth's Age
by Peter
Chemistry
0
0
0
0
1
0
Hazardous content
Understanding Uranium from Uraninite — The Element That Changed Everything
by Peter
Periodic Table
0
0
0
0
0
0
Hazardous content
Understanding Vanadium from Vanadinite — The Rainbow-Blooded Metal Named for a Goddess
by Peter
Periodic Table
4
0
0
0
0
0
Hazardous content
Understanding Beryllium from Beryl — The Toxic Gem Metal Behind Emeralds
by Peter
Ancient
1
0
0
0
0
0
Understanding Strontium from Celestine — The Element That Paints Fireworks Red
by Peter
Ancient
0
0
0
0
0
0
Understanding Barium from Baryte — The Heavy Earth That Glows in the Dark
by Peter
Ancient
0
0
0
0
0
0
Understanding Aluminum Extraction from Bauxite — The Metal More Precious Than Gold
by Peter
Chemistry
3
0
0
0
4
0