Ascience class is studying how things change when they are mixed together. study the data table below. results of mixing different substances together mixture created color change temperature change formation of bubbles salt and water clear no change no change no change acid and base clear no change warm to the touch no change lemon juice and red cabbage juice dark purple to pale pink no change no change baking soda and vinegar clear to white warm to the touch foamy bubbles based on the data, which of the following is a valid conclusion? a. mixing acid and base only makes a physical change. b. mixing lemon juice and red cabbage juice makes a chemical change. c. mixing baking soda and vinegar only makes a physical change. d. mixing salt and water makes a chemical change.

For a family dinner, jose’s mom baked a loaf of bread. during the meal, his grandmother commented, “this bread is so dense! ” what do you think his grandmother meant by the word dense? you have some ideas regarding density already, but this experiment will enrich your understanding of the relationship between mass, volume and the density of objects. when making measurements in this experiment we will be using si units, the international system of units. the purpose of using si units is to have the ability to communicate and compare data results with other experiments without having to make conversions. measurement symbol si unit length m meter mass kg kilogram volume l liters density kg/l kilograms per liter any calculations that are performed during this experiment will ultimately be reported in scientific notation. recall that scientific notation is extremely important when we have data that is extremely small or large. scientists rely on a standard form of communication to quickly make hypotheses and judgements based on data. what is the density of block a? a0kg/l what is the density of block b? a1kg/l what is the density of block c? a2kg/l what is the density of block d? a3kg/l what is the density of block e? a4kg/l which block is the densest? a5