Which phrase does not describe a mineral?
a. specific chemical consumption b. organic solid c. crystal structure d. naturally occurring

Which type of current is produced by a wire breaking magnetic field lines and changing the polarity? a. alternating b. direct c. straight d. alternating and direct

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

Rank the six combinations of electric charges on the basis of the electric force acting on q1. define forces pointing to the right as positive and forces pointing to the left as negative. rank positive forces as larger than negative forces. q1,q2,q3 = positive(+) q1 = + q2 = + q3 = - q1 = + q2= - q3= + q1= - q2= + q3= + q1= + q2= - q3= - q1,q2,q3 = negative