TB1.4 U3.1

3. An object or machine that has been invented for a particular purpose.
7. /ˈɪn.ə.veɪ.t̬ɪv/
9. Keep something somewhere to use later
11. Able to continue over a period of time
12. To become connected to a piece of electrical equipment or to the main electricity supply.
13. It was designed in a computer.
14. Change from one system to another.

1. A thin, usually square or rectangular piece of baked clay, plastic, etc. used for covering roofs, floors and walls.
2. Involving or producing movement
4. Relating to products, systems, etc. that use as little electricity, gas, etc. as possible.
5. Using a system of radio signals rather than wires to connect.
6. A standard or level that is considered to be typical or usual.
8. It runs on energy that comes from the sun.
10. Using the most advanced and developed machines and method.