Jill has found evidence that suggests that individual volcanoes produce igneous rocks with a certain chemical signature. she predicts that scientists could use an igneous rock's chemical signature to determine where the rock came from. what type of investigation should jill perform to test her prediction?

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.

there are indirect ways of affecting state laws   by with holding funding's. and that's why we have a 55mph speed on the high way with a design of 70mph speed.

answer; /// the above statement is (true);