Density and buoyancy crossword

This printable crossword puzzle on the topic of Physics has 10 clues. Answers range from 3 to 19 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

The densest state of matter has a fixed/ rigid shape
has no rigid shape no fixed shape and is the second densest state of matter
Not rigid no fixed shape or volume and is the least dense state of matter
Exist at extremely high temperatures, particles move freely with extremely high energy. appears in lightning, the tail of a comet, and stars
the amount of atoms in a certain amount of space
has a density of 1 g/ml
d/mv where m=mass and v=volume. this is the formula for what?
The ability to float in a liquid
the opposite of gravity that pushes up a submerged object
the amount of buoyant force is equal to the weight of which the water displaces