One big reason that life on Earth exists - Elise Cutts
Learning Stats
CEFR 等级
Total Words
Unique Words
难度
字幕 (73 segments)
Download4.5 billion years ago,
Earth had barely even formed when it was struck by a rock the size of Mars,
flying roughly nine kilometers a second.
The force of this collision partially vaporized both celestial bodies,
temporarily turning the Earth's surface into an ocean of molten magma.
Today, some scientists call this cosmic crash the Big Whack.
And while our planet has long since cooled off,
we’re still dealing with the impacts of this impact.
Full subtitles available in the video player
Key Vocabulary (18)
extended
"Long road."
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 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.
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.
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.
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."
Grammar in This Video
"the light is concentrated in one spot"
"When the beam strikes the surface head-on, the light is concentrated in one spot"
"Earth had barely even formed when it was struck"
"it’s largely kept stable by the moon’s gravitational pull"
"it was struck by a rock the size of Mars"
"Not only did the Earth’s moon form from Big Whack debris"
"However, instead of standing straight up, the Earth does all this"
"Not only did the Earth’s moon form from Big Whack debris"
"it should be no surprise that changes to this tilt would impact Earth’s climate"
