By Levels

Library

EXP: 08888
HITS: {{lyricTraining.hits}}888
STREAKS: {{lyricTraining.streaks}}888
TIME: {{lyricTraining.timeout / 1000}}88
{{word.word}}

{{cue.translated_text}}

{{lyricTraining.hint}}

x{{playblackSpeed.toFixed(2)}}

Loading ..

Not Found

{{annotation.word}} ({{annotation.pos_simplify}})

/{{annotation.phonetic}}/

{{annotation.translation}}

{{annotation.name}}

{{annotation.sub_type}}

{{annotation.definition}}
Back

Games & Quizzes

Training Mode - Typing
Fill the gaps to the Lyric - Best method
Training Mode - Picking
Pick the correct word to fill in the gap
{{game.name}}
{{game.description}} Requires {{game.required_annotions}} vocabulary annotations

Congratulations! You gained {{totalPoint}} XP

You may need to watch a part of the video to unlock quizzes

Don't forget to Sign In to save your points

Repeat Skip ({{game.question_index}}/{{game.questions.length}})
{{part}}
Repeat Skip ({{game.question_index + 1}}/{{game.questions.length}})
{{choice.text}}
{{choice.text}}

Make correct pairs from two columns

{{lyricTraining.finished && lyricTraining.timed_out ? 'Timed Out' : 'Challenge Accomplished'}}

PERFECT HITS {{lyricTraining.stats.PERFECT_HITS}} +{{lyricTraining.stats.PERFECT_HITS * 20}}
HITS {{lyricTraining.stats.HITS}} +{{lyricTraining.stats.HITS * 10}}
LONGEST STREAK {{lyricTraining.stats.LONGEST_STREAKS}} +{{lyricTraining.stats.LONGEST_STREAKS * 10}}
REMAINING TIME {{lyricTraining.timeout / 1000}}s +{{lyricTraining.timeout / 1000}}
TOTAL +{{lyricTraining.exp}}
{{word.word}} - {{dictionary.definition[0].phonetic || ("/" + dictionary.phonetics +"/")}} - {{word.translation}}

We couldn't find definitions for the word you were looking for.
Or maybe the current language is not supported

{{simpleDefinition.pos}}

{{simpleDefinition.def}}

{{word.word}}

Sentences & parts of speech:

  • {{tag.normal}} {{tag.pos_name}}

  • {{c.startTime | duration}}


    {{c.translated_text}}

All {{pos.pos_simplify}}
{{a.word || a.name}}
/{{a.phonetic}}/
{{a.type || a.sub_type}}
{{a.translation}} 		{{a.definition}}

Quasars | Stars, black holes and galaxies | Cosmology & Astronomy | Khan Academy

203,802 views

Khan Academy

Video Language:

  • English

Caption Language:

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

Accent:

  • English (US)

Speech Time:

96%
  • 8:55 / 9:15

Speech Rate:

  • 172 wpm - Fast

Category:

  • Education

Tags :

Intro:

Video Vocabulary

supermassive

/ˌso͞opərˈmasiv/

adjective

having mass many times that of sun.

neither

/ˈnēT͟Hər/

adjective adverb conjunction determiner pronoun

Not one or the other not either none of two things. used before first of two alternatives to indicate that they are each untrue. Not in either case. not one nor other of two people or things. not the one nor the other of two people or things.

sources

/sôrs/

noun verb

place, person, or thing from which something comes or can be obtained. obtain from particular source.

nucleuses
other

Control center of a cell.

released

/rəˈlēs/

verb

allow or enable to escape from confinement.

observations

/ˌäbzərˈvāSH(ə)n/

noun other

action of observing carefully. Practices of performing actions required by rules.

energetic

/ˌenərˈjedik/

adjective

showing or involving great activity or vitality.

electromagnetic

/əˌlektrōmaɡˈnetik/

adjective

Having magnetic and electrical parts.

surface

/ˈsərfəs/

adjective noun verb

relating to or found on surface of something. Nature or emotions that show, but may not be true. To give (road) a top layer.

Q
W
E
R
T
Y
U
I
O
P
A
S
D
F
G
H
J
K
L
Z
X
C
V
B
N
M