The Big Bang and Our Universe

123456789101112131415161718
Across
  1. 3. A type of electromagnetic radiation that transmits and receives radio frequencies.
  2. 6. The number of waves that pass a fixed point in time.
  3. 7. The expansion of our universe (also a word to describe blowing up a balloon).
  4. 9. The segment of the electromagnetic spectrum that the human eye can view.
  5. 13. The shift in color that happens when an object is moving towards an observer.
  6. 15. The element on the Periodic Table that has one proton.
  7. 16. The shift in color that happens when an object is moving away from an observer.
  8. 17. A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
  9. 18. A hypothetical form of matter that appears not to interact with light or the electromagnetic field.
Down
  1. 1. These waves are invisible to the human eye, some insects, such as bumblebees, can see them.
  2. 2. All of space and time and their contents.
  3. 4. This form of radiation on the electromagnetic spectrum that is used to generate images of tissues and structures inside the body.
  4. 5. The change in the frequency of a wave based on the relationship between the observer and the object.
  5. 8. Unknown form of energy that affects the universe on the largest scales.
  6. 10. Electromagnetic radiation that is emitted by heated objects.
  7. 11. The theory of how the universe was created
  8. 12. Made from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves.
  9. 14. Describes the center of a black hole, a point of infinite density and gravity.
  10. 15. The element on the Periodic Table that has two protons.