Why is the sky blue?
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Gases
A state of matter, have no fixed shape and take on the shape of the space they're in
particles
A very small piece or part; a tiny portion or speck
Matter
Anything that has mass and takes up space
Atoms
Building blocks of matter
molecules
Groups of two or more atoms held together by chemical bonds
nitrogen
Most abundant gas in the atmosphere
Oxygen
gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells
beam
ray of light
violet
shortest wavelength
drift
to be carried along by currents of air or water
scatter
to cause to separate and go in different directions
colorless
without color
