The Sun and Earth, Seasons, and Days and Nights
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20 Terms
Revolution is…
Earth’s orbit around the Sun.
Revolution takes…
1 year or 365.25 days.
Revolution causes…
Seasons
Hemisphere
The northern and southern halves Earth is divided into.
Equator
The imaginary line that divides into Northern and Southern Hemispheres.
Earth is tilted at…
23.5 degrees
Equinox
In Autumn and Spring, twice a year, when both hemispheres have the same length in a day.
Solstice
In Winter and Summer, twice a year, the longest and shortest days in the year where the Earth is tilted towards the Sun the most and least.
Day
Earth’s side faces towards the Sun.
Night
Earth’s side faces away from the Sun.
Rotation is…
When Earth spins on its axis.
Rotation takes…
24hrs or 1 day
Rotation causes…
Days and Nights
Sol
Latin for Sun
Terra
Latin for Earth
Sun’s size
109 times that of Earth
Rotation on Earth…
Anti-clockwise, west to east.
Axis
Imaginary line from the north to south poles.
Sunrise and sunset
Sun seen over horizon.
Aristotle
The man who first observed Earth’s spherical shape, by looking at ships approaching the horizon.