Across
- 1. A machine that sends messages over long distances using electricity.
- 4. A global network of computers that allows people to communicate and share information.
- 5. A way to communicate over long distances by creating smoke patterns.
- 7. A device used to talk to people who are far away.
- 8. A device that sends and receives sound waves through the air.
- 9. People who deliver messages to others.
Down
- 1. A device that shows moving pictures and sounds.
- 2. Pictures drawn on cave walls using natural pigments.
- 3. Instruments used to create sounds that can be heard from far away.
- 6. Websites and apps that allow people to connect and share information with others.