13. Classify as man-made or natural extinction: Massive impact from asteroid or comet. O Both
O Neither
O Natural Extinction
O Man-made

The boiling point of liquids is very high what does it indicate

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

What was bohr’s contribution to the planetary model