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Ozone layer and eukaryotes show up in the Proterozoic eon | Cosmology & Astronomy | Khan Academy

97,279 views

Khan Academy

Video Language:

  • English

Caption Language:

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

Accent:

  • English (US)

Speech Time:

98%
  • 9:45 / 9:56

Speech Rate:

  • 161 wpm - Fast

Category:

  • Education

Tags :

Intro:

Video Vocabulary

cyanobacteria

/ˌsīənōbakˈtirēə/

noun

division of microorganisms that are related to bacteria but are capable of photosynthesis.

interesting

/ˈint(ə)rəstiNG/

adjective verb

arousing curiosity or interest. To make someone want to know about something.

rewrite
noun verb

instance of rewriting something. write something again so as to alter or improve it.

somewhat

/ˈsəmˌ(h)wät/

adverb

Rather; kind of (but not great).

happens

/ˈhapən/

verb

To take place or occur.

produce
noun verb

Fresh foods such as fruits and vegetables. To control the making a movie or television show.

profound

/prəˈfound/

adjective noun other

very great or intense. deepest part of something. Requiring deep thought; difficult to understand.

billion

/ˈbilyən/

noun number

Number 1,000,000,000. thousand million.

happened

/ˈhapən/

verb

To take place or occur.

started

/stärt/

verb

To turn something on.

roughly

/ˈrəflē/

adverb

In a manner that is violent or not careful.

absorbed

/əbˈzôrbd/

adjective verb

taken in or soaked up. To take up all attention / energy of something.

possible

/ˈpäsəb(ə)l/

adjective noun

able to be done. candidate for job.

ancient

/ˈān(t)SHənt/

adjective noun

Very old; having lived a very long time ago. old man.

beginning

/bəˈɡiniNG/

adjective noun verb

new or inexperienced. point at which something begins. To do the first part of an action; to start.

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