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Why are Smoke Detectors Radioactive? And How do Smoke Detectors Work?

16,745 views

Intro:

Video Vocabulary

/imˈpôrtnt/

adjective

Having a big effect on (person, the future).

/ēˈjekt/

verb

force something out violently.

/ˈīəˌnīz/

verb

To convert or be converted totally or partially into ions.

/ˈmīkrōˌCHip/

noun verb

Device in computers that do calculations. implant microchip under skin of domestic animal as means of identification.

/dəˈskəs/

verb

talk about something with person or people.

/ˈspēkər/

noun

Electronic device for making or broadcasting sound.

/ˈnəmbər/

noun other verb

arithmetical value expressed by word, symbol, or figure. Symbols such as 1, 2, 56, 793. To claim to be part of a larger group, series, set.

/əˈnəT͟Hər/

adjective determiner pronoun

One more, but not this. used to refer to additional person or thing of same type as one. additional person or thing of same type.

/iˈspeSHəlē/

adverb

used to single out one person or thing over all others.

/ˈpərCHəs/

verb

To buy something; to get by paying money for it.

/ikˈstrēmlē/

adverb

In a way that is much more than usual or expected.

/ˈspänsərd/

adjective verb

Helped to succeed/happen by being given money. To help someone succeed by giving them money.

/ˈdānj(ə)rəs/

adjective

Involving the chance of hurt or damage; risky.

adjective adverb noun preposition

situated on or near outside. situated beyond boundaries of place. Area around or near something, such as a building. situated beyond boundaries of.

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