A student made a model of a river in a sandbox. A pile of sand represents soil and bits of rock in the riverbed. Water

pouring from a hose represents river water as it flows

downhill.

Which two characteristics are limitations of the student's model?

The table below shows the freezing points of four substances. substance freezing point (°c) benzene 5.5 water 0 butane –138 nitrogen –210 the substances are placed in separate containers at room temperature, and each container is gradually cooled. which of these substances will solidify before the temperature reaches 0°c? benzene water butane nitrogen