The yellow circle represents the sun. If you were standing on the blue circle (earth) and looking up at the moon, you would be seeing the—-/moon., new, full, crescent, gibbons

how to make a simple air condition

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.