Answer:
It means that something in the blue sky above appears threatening. Whatever the thing in the sky may be is causing you fear! It suggests a horrible danger to come. You better run before it's too late.
Have a good day!
There are too many to list here, but I think you can find the answer by simply looking it up on google. c: Wikipedia might not be the most reliable source, but it has an extensive list of all of Frost's poems.
Answer:
With the help of the sun, liquid water can evaporate into air in the form of water vapor.
Explanation:
The sun heats water, be it ocean water or a glass of water you left outside. When it heats this liquid, the water evaporates and converts into water vapor. This is because the molecules in water begin to vibrate and motion spontaneously, also making them a gas.