Crossword Puzzle

12345678
Across
  1. 1. Being very smart
  2. 4. Something new that someone thinks up and creates
  3. 6. Where scientists work and do experiments
  4. 8. A test that helps scientists answer questions
Down
  1. 2. Run by electricity
  2. 3. A sound, movement, or sign that sends a message
  3. 5. Small machine or tool that is useful
  4. 7. Sometimes but not very often