Why is the sky blue? Why does the moon appear in the daytime?
How much does the sky weigh?
How much does the Earth weigh?
How do airplanes stay in the air?
Why is water wet?
What makes a rainbow?
Why don't birds get electrocuted when they land on an electric wire?

1. Gases and particles in Earth's atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.

2. The surface of the moon is reflecting the sun's light into our eyes. When we see the moon during the day it's because the moon is in the right spot in the sky and it's reflecting enough light to be as bright, or brighter, than the sky.

3. 14.7 lbs per square inch

4. 5.972 × 10^24 kg

Explanation:

force tends to be low and long diustance masses are high

it is a negative acceleration