Lesson 10

12345678
Across
  1. 3. a small machine or tool that is useful
  2. 5. a test that helps scientists answer their questions
  3. 8. sometimes but not very often
Down
  1. 1. something new that someone thinks up and creates
  2. 2. a place where scientists work and do experiments
  3. 4. a very smart person
  4. 6. a sound, a movement, or another sign that sends a message
  5. 7. run by electricity