B1 中級 English 4:56 687 単語 Documentary

One big reason that life on Earth exists - Elise Cutts

TED-Ed · 156,533 回視聴 · Added 3時間前

Learning Stats

B1

CEFRレベル

687

Total Words

347

Unique Words

5/10

難易度

Vocabulary Diversity 51%

字幕 (73 segments)

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00:07

4.5 billion years ago,

00:09

Earth had barely even formed when it was struck by a rock the size of Mars,

00:14

flying roughly nine kilometers a second.

00:18

The force of this collision partially vaporized both celestial bodies,

00:22

temporarily turning the Earth's surface into an ocean of molten magma.

00:27

Today, some scientists call this cosmic crash the Big Whack.

00:31

And while our planet has long since cooled off,

00:33

we’re still dealing with the impacts of this impact.

Full subtitles available in the video player

Key Vocabulary (18)

long A1 adjective

extended

"Long road."

year A1 noun

A year is a period of time that lasts 365 days, or 366 days in a leap year. It represents the time it takes for the Earth to complete one full revolution around the Sun.

"I've lived here for three years now."

climate B2 verb

Climate refers to the long-term patterns of weather conditions, such as temperature and rainfall, in a particular region over many years. It can also describe the prevailing mood, conditions, or social atmosphere of a specific time or place.

angle C1 adjective

Positioned at a slant or lean; not perpendicular or parallel to a specific reference point. It can also describe a biased or specific perspective taken when presenting information.

around C2 adverb

As an adverb at a C2 level, it denotes presence, availability, or existence within a specific vicinity or context. It is also used to indicate approximate values or to describe movement or positioning that encircles a point or lacks a specific direction.

light A1 adjective

Describes a space that has a lot of natural brightness or many windows. It also refers to colors that are pale or close to white rather than dark.

"This is very light."

years
earth
surface
planet
ice
changes
earth’s
tilt
seasons
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