The three major scales used to measure earthquakes are mercalli scale, richter scale and magnitude scale.
a. true
b. false

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive

Where do magnetic lines of force enter earth?

Select the correct answer. what does the process of natural selection involve?