What is it called when a solid turns directly into a gas

Sublimation

Explanation:

Example: Dry ice, camphor

Explanation:

This process is called sublimation.

When heat is added to a solid, it turns into gas, the process is called sublimation.

For example, camphor, napthalene balls, etc.

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.