Does changing the state of matter change the mass of the object? Problem We want to know if the mass of ten chocolate Easter eggs will change after melting them.
If we take the same amount of chocolate Easter eggs, take their mass and melt them, we think that melting them will change their mass. If we take the same amount of chocolate Easter eggs, take their mass and melt them, we think that melting them will NOT change their mass. 5 Students19 Students Hypothesis
Materials One bag of Resses Chocolate eggs. A scale A cup Microwave to melt the chocolate Easter eggs.
1.Measure the mass of ten unwrapped chocolate Easter eggs in the cup on the scale and record. 2.Melt the chocolate Easter eggs in the cup in the microwave for one minute. 3.Measure the mass of the melted chocolate Easter eggs with the cup. 4.Conduct multiple trials (3). Procedure
Independent Variable: We changed the state of matter of the chocolate Easter eggs from solid to liquid by adding heat. Dependent Variable: The mass of the chocolate Easter eggs. Variable
Everything else stayed the same: same type and amount of chocolate Easter eggs. We used ten to conduct each of the three trials. We used the same procedure each time. Control
Results Students collected the information and wrote it in their Science journals.
Results Trial 1Trial 2Trial 3 Before melting (Solid)144 gr.146 gr.145 gr. After melting (Liquid)144 gr.146 gr.145 gr.
We conduct ed 3 trials and measur ed the mass before and after melting the Easter eggs. Results
We learned that changing the state of matter of the Easter chocolate eggs from solid to liquid did not change the mass of the ten eggs. The hypothesis 2 was correct while hypothesis 1 was incorrect. After the second trial, the students from hypothesis 1 started to change their prediction based on the data. We learned that matter can change its form due to changes in temperature while its mass remain the same. Conclusion
Changing states of matter-Brainpop Jr. 3 rd Grade Science textbook, Mc Graw-Hill www.schoolforchampions.com/science/mat ter_states_changing.htm Resees website. Bibliography