Matter and Energy Lab Report

Matter and Energy Lab Report Introduction For this lab activity, you will observe two scenarios — The Iced Tea Debate and Salty Soup — and record your observations of physical and chemical change. During your observations, you will determine how each scenario represents the laws of conservation of matter and energy. Problem: How can matter and energy be described and conserved in a variety of systems? Hypotheses: As you view each scenario, make a prediction about what will occur when prompted by the video. The Iced Tea Debate: If the temperature of the iced tea dropped when it was put into the freezer , then the iced tea became frozen The Salty Soup: Hypothesis 1: What will happen to the soup as it is heated on the burner? If the temperature of the soup is hot, causing the soup to boil, then all the water would evaporate Hypothesis 2: 2nd pause in the video. If the soup is salty it won't taste as good, then Adding more water will make the soup less salty. Materials: 1. Demonstrations: “The Iced Tea Debate” and “The Salty Soup.” Procedures: 1. Observe and analyze the following video demonstrations: “The Iced Tea Debate” and “The Salty Soup.” 2. Use the data table to record observations on physical and chemical change, and the conservation of matter and energy. Data and Observations: Record your detailed observations and draw some brief conclusions in the table below. The Iced Tea Debate Describe the physical changes you observed. Describe the chemical changes you observed. The Salty Soup As temperature decreases to 0 degrees, tea will freeze I think that the reason the soup is salty is because he left it on the stove top and some of the water evaporated making it slatier. When the tea was taken out of the freezer it was frozen like a rock. The soup was so good at the beginning and then (Mr. rocket science guy) left it on the stove and some of the water evaporated. Then he came back to check and some of the water was gone and the soup tasted salty. Questions and Conclusion 1. How was matter and energy conserved in each demonstration? In the Ice Tea debate the tea is changed from a liquid to a solid. This shows that the matter which is the tea is conserved but it is just in a different form of state. In the salty soup scenario, the water is turned into vapor. The salty soup experiment relates to the law of conservation of energy because when you boil it remains the same and the law of conservation of mass the soup consistency and weight remains the same 2. What phase changes did you observe? The tea is changed from a liquid to a solid. This shows that the matter is conserved, and the state of the tea is changed but no matter is lost. In the Salty soup lab, the water in the soup evaporates and is transformed into vapor. 3. What kind/s of energy transfers did you notice in each scenario? The energy transfer i noticed in each of the scenarios was by an electrical unit 4. Identify an example of matter and energy conservation in the world around you. Example of the matter is a table. An example of energy conservation is switching off the light. Conclusion: How did your observations support or contradict your predictions? Describe an experiment that could further explore physical or chemical change. The Law of Conservation of Mass states that mass is conserved in physical and chemical changes. I explored this concept by taking initial masses, making predictions, and finding final masses of physical and chemical changes. I observe water changing from ice to a liquid, a piece of cardboard being cut up, salt dissolving in water, Seltzer reacting in water, and water's physical property being disrupted by soap.