holly has an unknown substance in a beaker. she wants to determine the relative ph of the unknown substance. she places a piece of blue litmus paper into the substance, and the litmus paper stays blue. the substance in the beaker

25 points fast click to review the online content. then answer the questions(s) below, using complete sentences. scroll down to view additional questions. online content: site 1. take the study skills assessment. identify one area in which you could improve. then describe what steps you will take to improve in that area.

Afish fossil is found in a rock. a foot bone and tooth are found in an older layer of the same rock. what can scientists learn from the rock? a) the area changed from land to water. b) the area changed from water to land. c) the area has always been land. d) the area was once an ocean.

Why are metamorphic rocks formed by contact metamorphism usually not dense or resistant?