Please help !!

Select all the correct answers.
Magnetometers revealed that the basalt rocks along the mid-ocean ridges are aligned in alternating, symmetrical patterns. Which factors are responsible for this orientation?

A) age of the rocks

B) magnetic polarity of the rocks

C) shape of the rock

D) depth of the rock

E) variations in water color

What can be added to the examples section of each circle? endothermic: ice melting into water, and a heat pack becoming warm exothermic: a glow stick glowing, and fireworks exploding endothermic: ice melting into water, and an instant ice pack turning cold exothermic: fireworks exploding, and gasoline burning endothermic: a glow stick glowing, and a heat pack becoming warm exothermic: an instant ice pack turning cold, and ice melting into water endothermic: gasoline burning, and an instant ice pack turning cold exothermic: ice melting into water, and an instant ice pack turning cold

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

Compare and contrast physical changes with chemical changes.