Science and technology

2. a small flying machine without a pilot, controlled from the ground or by a computer
3. an object that moves around a planet, often used for communication or watching Earth
10. to give your time or energy to something important
11. to change something into a different form or use
12. using resources in a way that does not harm the environment for the future
13. a type of energy that powers lights, machines, and devices
14. something that you wear your wrist that can connect to your phone and show messages or health information

1. something that takes the place of another thing
3. watching someone or something carefully, often for safety or security
4. help or advice that shows you what to do
5. no longer used because something newer or better exists
6. a device that is connected to the internet and can answer questions or play music when you speak to it
7. a small, useful tool or electronic device
8. a person who creates something new for the first time
9. a new idea, method, or product