science words

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Across
  1. 2. energy emitted from a source that travels through space or materials in the form of wave
  2. 5. The smallest matter that retains the chemical prropertys of an element.
  3. 6. The gas the humans breath in.
  4. 7. The substence studied in matter science.
  5. 8. A tube that is wide at the top and narrow at the bottom.
Down
  1. 1. The branch of knowledge with engineering.
  2. 3. the study of immunity.
  3. 4. A layer of gasses that suround a celestrial body.
  4. 8. The chemical breakdown of substences by microorganisims.