1. Which is an observation? a) Atoms consist of protons, neutrons, and electrons.
b) All matter is composed of atoms.
c) Water is colorless.
d) Atoms can form chemical bonds by sharing electrons.

Drag each description to the correct location on the image. not all descriptions will be used. describe the parts of a comet. the frozen part of the comet the atmosphere of gases and dust formed when the nucleus vaporizes tail made of small, solid dust particles tail made of ions that appears to point away from the comet's orbit