• 1 · Religion and Magic
• 2 · Nature
• 3 · Human Being, Man in General
• 4 · Society, Civilization, Culture
• 5 · Abstract Ideas and Concepts
• 6 · History
• 7 · Bible
• 8 · Literature
• 9 · Classical Mythology and Ancient History

• Top
• 5 · Abstract Ideas and Concepts
• 51 · Generalities

51G · Some Characteristics of Matter

• 51G1 · Largeness, Magnitude
• 51G2 · Heaviness
• 51G3 · Toughness
• 51G4 · Hardness
• 51G5 · Visibility
• 51G6 · Smoothness