Science Unit 4

• What type of bond exists between hydrogen and oxygen atoms in a water molecule?

  Covalent bond
• What is a hydrogen bond in water formed between?

  Oxygen and hydrogen atoms
• Which physical properties of water are influenced by hydrogen bonds?

  Surface tension and specific heat
• Steps in water transport in plants

  1️⃣ Water adheres to the walls of the xylem

  2️⃣ Cohesion pulls water molecules upward

  3️⃣ Capillary action moves water against gravity

  4️⃣ Water reaches the leaves for photosynthesis
• What allows water striders to avoid sinking into water?

  Surface tension
• What property of water cools the skin after exercise?

  Heat of vaporization
• Why is ice less dense than liquid water?

  Crystal lattice structure