Introduction: What do scientists do? -- Earth science -- In the clouds. Are clouds salty? -- The sun. Does paper need sunscreen, too? -- Earth on the move. Can grass show soil erosion -- What makes climate?. Can you capture heat? -- All about weather. How strong is air pressure? -- Magnetic Earth. How do paper clips respond to magnets? -- Life science -- Seed germination. Are seeds alive? -- Growing plants. Where do plants grow best? -- Thirsty plants. How do plants drink? -- Plants and water. What effect does oil have on plants? -- Growing crops for food. What's the difference between organic and genetically modified food? -- Yeast fermentation. Why does bread rise? -- Break it down. Which foods get the moldiest? -- Water, water everywhere. Does bottled water taste different than tap water? -- Color and temperature. Which warms up faster: a light-colored liquid or a dark one? -- Know your nutrients. Which snack food is greasiest? -- Digestion. How does detergent clean dirty dishes? -- Benefits of exercise. What makes your heart beat faster? -- Get moving!/ Are bones brittle? -- Skin: its all over you. Which part of your arm is the most sensitive? -- Genes and heredity. What traits do you share with your family? -- Growing up. Do boys and girls grow differently? -- Forms of identification. What is similar about people's fingerprints? -- Physical science -- A simple reaction. Can vinegar clean a tarnished penny? -- Acids and bases. How can you tell an acid from a base? -- Crystalline growth. How do crystals form? -- Un-mixing it up. What color marker runs the most? -- Making bubbles. What makes the bubbliest soda? -- Turn up the heat. What makes a good conductor? -- Heat rises. What's so weird about Ivory soap? -- All water is not equal. Can you keep water from freezing? -- Chemistry of clean. What's the best stain remover? -- Mass matters. Which objects float in water? -- The pressure's on. Can you trap air underwater? -- A push for a push. How can I make a soda can spin? -- Light travels. Can water affect how light moves? -- Technology and engineering -- Gravity and motion. What makes the best cushion for a falling egg? -- Get energized! Can you launch a ball farther with a catapult? -- Makin' it stick. Which shoe is best for a big hike? -- Going with the flow. Can a battery turn a simple wire into a magnet? -- Using the power of water and wind. How do turbines create power? -- Holding on to hot and cold. Which insulator works best? -- Types of bridges. Which bridge design is strongest? -- Staying afloat. Which boat shape holds more weight? -- Science fair success secrets.