What do these two changes have in common? ice crystals forming on a window
an engine using gasoline to power a car
Select all that apply.
Both are caused by heating.
Both conserve mass.
Both are only physical changes.
Both are caused by cooling.

Julia would be observing a. static electricity was caused by her sweater rubbing against her shirt and transferring electrons. she didn't touch anything metal, so that would cancel out b.she most likely didn't rub her sweater against her hair either, so that cancels out c.she also didn't scoot across the carpet while trying to take her sweater off, that cancels out d.so that leaves a.a. is correct.

The sun's gravitational pull is weaker on the planets that are closer to it, i think.