Physical Science 7H

123456789101112
Across
  1. 3. Atoms are single neutral particles. Molecules are neutral particles made of two or more atoms bonded together.
  2. 6. Change When a substance combines with another to form a new substance.
  3. 7. Travels in narrow beams called rays.
  4. 11. The material, or matter, of which something is made
  5. 12. Can make things move, change shape or change their speed.
Down
  1. 1. Light travels as this.
  2. 2. The waves that moves in straight lines through space.
  3. 4. Transferred in waves through the frequency of particles.
  4. 5. The waves that move on top of water.
  5. 7. Change A change affecting the form of a chemical substance.
  6. 8. The waves that travels through air and allow us to hear sound.
  7. 9. A group of atoms bonded together.
  8. 10. The basic unit of a chemical element.