Suppose a person built a sandcastle of moon sand on the moon. What would that person find there a month later? The sandcastle would have grown larger because moon sand particles attract other moon sand particles.
The sandcastle would be much smaller because changing winds would have eroded much of the sand away.
The sandcastle would have grown larger by collecting more sand particles because moon sand is blown by wind.
The sandcastle would remain in place the same size that it was because the moon has no wind.

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.

The heliocentric and the geocentric models of the solar system included these central principles

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. which of the following best describes how such a telephone is able to transmit and receive information? a. the cellular telephone transmits, receives, and encodes information using only sound waves. b. the cellular telephone transmits, receives, and encodes information using only electromagnetic waves. c. the cellular telephone transmits information by electromagnetic waves to a receiver which then encodes them and produces sound. d. the cellular telephone transmits information by sound waves to a receiver which then encodes them and produces electromagnetic waves.