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

16,745 views

Branch Education

Video Language:

  • English

Caption Language:

  • {{captionLanguage | language_name}} ({{captionLanguage}})

Accent:

  • English (US)

Speech Time:

99%
  • 18:53 / 18:59

Speech Rate:

  • 138 wpm - Conversational

Category:

  • Education

Tags :

Intro:

Video Vocabulary

important

/imˈpôrtnt/

adjective

of great significance or value.

ejected

/ēˈjekt/

verb

force something out violently.

ionizing

/ˈīəˌnīz/

verb

To convert or be converted totally or partially into ions.

microchip

/ˈmīkrōˌCHip/

noun verb

tiny wafer of semiconducting material used to make integrated circuit. implant microchip under skin of domestic animal as means of identification.

discuss

/dəˈskəs/

verb

talk about something with person or people.

speaker

/ˈspēkər/

noun

Person who makes a speech before a group.

numbers

/ˈnəmbər/

noun other verb

arithmetical value expressed by word, symbol, or figure. Particular songs or dances performed during shows. To claim to be part of a larger group, series, set.

another

/əˈnəT͟Hər/

adjective determiner pronoun

One more, but not this. One more added. additional person or thing of same type.

especially

/iˈspeSHəlē/

adverb

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

purchased

/ˈpərCHəs/

verb

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

extremely

/ikˈstrēmlē/

adverb

to very great degree.

sponsored

/ˈspänsərd/

adjective verb

provided with funding. To support the passage of a new law.

dangerous

/ˈdānj(ə)rəs/

adjective

Involving the chance of hurt or damage; risky.

outside
adjective adverb noun preposition

situated on or near outside. situated beyond boundaries of place. Area around or near something, such as a building. Beyond the limits or edges of some place, thing.

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