Astronomers think that the Earth likely formed at the same time as all of the other rocky materials in our solar system, including the oldest
meteorites. The oldest meteorites ever found on Earth contain nearly equal
amounts of both Uranium-238 (U-238) and Lead-206 (Pb-206). The half-life
of the U-238/Pb-206 decay pair is 4.5 billion years. According to this
absolute age-dating method, what is Earth's age? (Don't forget units!) *

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation:

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.