Capillary Tubes Rise to Different Heights

Water rises higher in narrower tubes. Ask students to predict what will happen. Place ends in same water reservoir. Key idea: Adhesion and surface tension pull water upward; tube radius changes balance with gravity. Ask: Why does narrower sometimes mean higher? Safety and cleanup: Use non-glass capillary tubes where possible. https://www.google.com/search?q=%22Capillary+Tubes+Rise+to+Different+Heights%22+science+demonstration+experiment