Scientific Words

Edit Answers
12345678910111213
Across
  1. 1. the smallest unit of an element that maintains the properties of that element
  2. 6. a pure substance made of only one kind of atom
  3. 9. the spontaneous disintegration of a nucleus into a slightly lighter and more stable nucleus
  4. 10. the combining of nuclei of light atoms, such as hydrogen, into heavier nuclei accompanied by the release of much energy
  5. 12. the force by which every object in the universe (that has mass) attracts every object.
  6. 13. an airlike fluid substance which expands freely
Down
  1. 2. a substance or object that occupies space
  2. 3. a thickness of material
  3. 4. mass divided by volume
  4. 5. the property of matter that is manifest as a capacity to perform work
  5. 7. the central core of an atom, containing protons and neutrons
  6. 8. the degree or intensity of heat present in a substance or object
  7. 11. the quantity of matter that a body contains