# Unit 2: Science and inventions

> Từ vựng và mẫu câu Unit 2 (Science and inventions), English Discovery 10: … was invented in … / People used to ….

Source: https://olyclass.com/library/tb-english-discovery-g10-u02/

- Subject: English
- Level: B1
- Textbook unit: 16
- Play it free on one screen (projector, TV or whiteboard): https://olyclass.com/library?play=tb-english-discovery-g10-u02
- Copy and edit it: https://olyclass.com/library?copy=tb-english-discovery-g10-u02
- Games it plays well in: [Dare Board](https://olyclass.com/classroom-games/dare-board/), [Lucky Wheel](https://olyclass.com/classroom-games/lucky-wheel/), [Picture Dice](https://olyclass.com/classroom-games/picture-dice/), [Ladder Climb](https://olyclass.com/classroom-games/ladder-climb/)

## Words in this game

- **necessity**: Water is a necessity for every person.
- **social networking site**: I use a social networking site every day.
- **download**: You can download this game for free.
- **post**: I post photos of my dog online.
- **update**: Please update your phone before you travel.
- **social media profile**: She wrote a short text on her social media profile.
- **revise**: We revise our lessons before every test.
- **digital invention**: The smartphone is a useful digital invention.
- **web browser**: I open a web browser to find information.
- **search engine**: A search engine helps me find answers online.
- **laser printer**: The school has a new laser printer.
- **experiment**: We did an experiment in science class.

## Questions

1. The light bulb ___ in 1879 by Thomas Edison. (invented / is invent / was invented / were invented)
   Answer: was invented
2. Before phones, people ___ write letters to friends far away. (are used to / use to / used to / was used to)
   Answer: used to
3. Which invention was invented first? (The laser printer / The smartphone / The web browser / The wheel)
   Answer: The wheel
4. People used to read news in newspapers. Now many people use ___. (a candle / a horse / a typewriter / the internet)
   Answer: the internet