Sometimes the moon appears to have a halo around it at night. why does this happen?
a. it's due to a partial lunar eclipse.
b. moonlight is refracted through ice crystals in high clouds.
c. it has to do with sunlight reflecting off the moon and back to earth.
d. it's actually an optical illusion caused by the moon being high in the sky.

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.

Explain teen pregnancy from a sociological perspective.