Imagine there are heavy rainfalls for days. the river near the area starts to overflow. erosion starts to take place. explain what happens

Erosion is the wearing away of rock and soil found along the river bed and the river banks. Erosion also involves the breaking down of the rock particles that get carried downstream by the river.  the rocks start to wear off and break down slowly.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).