7. Explain why observations of comets and shooting stars presented challenges to ancient astronomers using Ptolemy's model to explain the solar system.

d. air pressure decreases as altitude increases.

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.

  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.