Look for descriptive words like:

• Photograph: daguerreotype, gelatin silver print
• Painting: oil, latex, acrylic, watercolor
• Drawing: pen and ink, charcoal, watercolor
• Print: Etching, screen print, lithograph
• Building: metal, glass, concrete
• Sculpture: bronze, metal, wood, marble
• Pottery: Ceramic, clay, glass
• Textiles: Fiber, felt, silk