Ageologist is looking at deposits along a river below a large volcano. she finds large boulders mixed with sand and mud, and all of the material is comprised of volcanic rocks, particularly the mud which is volcanic ash. she quickly realizes these deposits represent an ancient a geologist is looking at deposits along a river below a large volcano. she finds large boulders mixed with sand and mud, and all of the material is comprised of volcanic rocks, particularly the mud which is volcanic ash. she quickly realizes these deposits represent an ancient lahar earthflow rock avalanche slump

The deposits represent an ancient lahar.
A lahar is a type of mud flow which contains different materials such as pyroclastic material, rocks and water. Lahars usually flow down volcanoes, along river valley. Lahars have a very high potential for destruction due to the high speed of the flowing slurry. A high velocity means that the mixture has a lot of energy and it essentially sweeps away anything in its path.

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero. 

Amicroscope, because these cells are so small that you would not be able to see them, or what they attack without it.