Lodestones were once used
A. heal people
B. pull nails from ships
C. point the way north in early compasses
D. all of the above

Prior knowledge can be gained from personal experience and a) forming well-developed hypotheses. b) listening to opinions of other people on a topic. c) researching previous experiments and results on a topic. eliminate d) no other methods. it can only be gained by personal experience.

Adding more tributaries to a local river basin can have what effect?

Which is abiotic? a. tree sap b. insect c. sunlight d. wood table