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Video zone: Can I power a flashlight without batteries? – exercises
At just 16 years old, Ann designed a flashlight which doesn’t need batteries. How did she create her
invention?
Do the preparation task first. Then watch the video and do the exercises. Remember you can read the
transcript at any time.
Preparation
Match the vocabulary with the correct definition and write a–h next to the numbers 1–8.
1…….. a grade a. a small, electric light which you can carry in your hand (British
English: a torch)
2…….. a flashlight b. a person who is obsessed with science or maths and who is
usually very intelligent
3…….. a nerd c. to be open to the possibility of doing something (opposite: to
refuse to do something)
4…….. to run on something d. a number or letter that shows a student’s result in a test
(American English)
5…….. to be willing e. to function, using something as energy
6…….. to flow f. a small square or rectangle, made of a material like ceramics,
clay or stone
7…….. a tile g. empty inside (e.g. a pipe or a tube)
8…….. hollow h. to move in a continuous, smooth way (often referring to the
movement of a liquid or a gas)
1. Check your understanding: reordering
Write a number (1–5) to put these topics in the order that Ann mentions them.
…………. How Ann first became interested in science
…………. Ann’s inspiration for her flashlight invention
…………. The number of people without electricity in the world
…………. How the flashlight works
…………. An incorrect stereotype about young scientists
Video zone: Can I power a flashlight without batteries? – exercises
2. Check your understanding: multiple choice
Circle the best answer to complete these sentences.
1. Ann says that people often expect her to be extremely ...
a. curious. b. talkative. c. intelligent.
2. Ann is fascinated by insects because they are tiny but ...
a. strong. b. complex. c. beautiful.
3. She says that if we want to help the environment, we need to ...
a. recycle. b. study science. c. change.
4. Ann’s friend in the Philippines had no electricity so she had bad ...
a. health. b. exam results. c. quality of life.
5. The flashlight is hollow so that it can generate electricity between your warm hand and the cold ...
a. air. b. plastic. c. LED light.
6. Ann says that the number of people in the world without electricity is ...
a. 1.4 million. b. 1.4 billion. c. over 4 billion.
Discussion
Do you think it’s a good invention? Do you have any other ideas for useful inventions?