Grade 5 Chapter 2 - Substances have Characteristic Properties. After seeing the teacher compare the weight of equal volumes of water and corn syrup, students compare the weight of equal volumes of water and vegetable oil to investigate the question: Is vegetable oil more or less dense than water?

Grade 2 Chapter 3 - Dissolving is a property. Students develop a test to compare the dissolving of an M&M and a Skittle in water to investigate the question: Do M&Ms and Skittles dissolve by the same amount?

Grade 5 Chapter 3 - Substances Can Mix and React to Form New Substances. Students design and conduct a test using baking soda and baking powder with vinegar to investigate the question: Will baking soda or baking powder produce more gas when vinegar is added?

Grade 5 Chapter 3 - Substances Can Mix and React to Form New Substances. Students help design a test using baking soda, corn starch, and cream of tartar to investigate the question: Which two of the three ingredients in baking powder react to make it bubble when water is added?

Grade 5 Chapter 3 - Substances Can Mix and React to Form New Substances. Students combine an Ivory Soap solution with an Epsom salt solution to produce a solid “soap scum” to investigate the questions: What happens when you mix soap with hard water? and Is soap scum different from soap?

Grade 5 Chapter 3 - Substances Can Mix and React to Form New Substances. Students add laundry detergent powder (a base) and cream of tartar (an acid) to a red cabbage indicator to investigate the question: What can the color of an indicator tell you about the substances added to it?

Grade 5 Chapter 3 - Substances Can Mix and React to Form New Substances. Students combine citric acid with calcium chloride and citric acid with baking soda to investigate the question: What are the similarities and differences between the two reactions? and Do substances react in a characteristic way?

Grade 5 Chapter 4 - Mass in Conserved in Physical and Chemical Change. Students measure the mass of substances before and after melting, dissolving, and a chemical change to investigate the question: Is mass conserved during physical and chemical changes?

Grade 2 Chapter 4 - Float and Sink. Students place small common objects made from wax, wood, metal, and rubber in water to investigate the question: Do certain materials tend to float or sink in water?

Grade 2 Chapter 5 - Heating and Cooling. Students warm butter until it melts and then cool it until it turns hard again as they investigate the question: How do substances change when they are warmed and cooled?

Grade 5 Chapter 5 - Engineering Design. Students test citric acid and cream of tartar with baking soda to investigate the question: Which reaction produces more gas? and How much of each reactant should be used to fill a bag with gas to make a cell phone float?

Grade 2 Chapter 5 - Heating and Cooling. Students design and conduct an experiment to see if baking powder causes more bubbling in warm or cold water to investigate the question: Does baking powder produce more bubbles when it is heated or cooled?

Grade 2 Chapter 6 - Atoms. Student groups use four or five Snap Cubes to make as many different objects as possible to investigate the question: How many different objects can be made by rearranging four cubes?

Grade 2 Chapter 6 - Atoms. After an introduction of Snap Cubes as models atoms and molecules, students use Snap Cubes to investigate the question: How can Snap Cubes be used to make models of different molecules?