Making a Convincing Argument
Kalani and Lael are students who have been comparing the total kinetic energy (thermal energy) of an iceberg to an ice cube. Read and compare their arguments. Then, answer the questions below.
Kalani’s Argument
My claim is that an iceberg has more total kinetic energy (thermal energy) than an ice cube. This is because even though an iceberg is about the same temperature as an ice cube, it is also much larger, so it is made of a lot more molecules. For this reason, an iceberg will have more total kinetic energy (thermal energy) than an ice cube.
Lael's Argument
An iceberg has more total kinetic energy (thermal energy) than an ice cube because it is larger and made of more molecules. This matters because molecules move, and moving things have kinetic energy, so each molecule adds its kinetic energy to the total. Since the iceberg and the ice cube are around the same temperature, the fact that the iceberg has extra molecules means that it will have more total kinetic energy (thermal energy).
Which argument is more convincing? What makes one argument more convincing than the other?

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