Question

using root words to determine meaning
based on the root word they share, what do mear
gs
of all the words on the left relate to?

thermometer
meter
diameter
metric
metronome
geometry
speedometer
kilometer

temperature
speed
measurement
music

Explanation:

The root word "meter" in words like "thermometer", "kilometer", "speedometer", "geometry", "metric", "diameter" is related to measurement. "Thermometer" measures temperature, "kilometer" measures length, "speedometer" measures speed, "geometry" (from "geo - meter" meaning earth - measurement) is about measuring shapes, "metric" is a system of measurement, "diameter" is a measurement of a circle.

Answer:

measurement