A system of organizing time that defines the beginning, length and divisions of a year
What is calendar?
200
The spinning of Earth on its axis
What is rotation?
200
They made the detailed observations of the sun, planets and other objects they see in the night sky. Also calculated that the length of a year is 365 and 1/4 days.
What is Chinese astronomers?
200
The reason why the Earth has seasons
What is because its axis is tilted as it revolves around the sun?
200
This happens every four years and February is given 29 days instead of the usual 28 days
What is a leap year?
300
Earth follows a path as it revolves around the sun
What is orbit?
300
Used to predict the positions of stars and planets
What is Astrolabes?
300
The temperature if the Earth's axis were straight up and down relative to its orbit
What is would remain fairly constant year-round?
300
This occurs twice a year when the noon sun is directly overhead at the equator or also known as "equal night". It is also when day and night are each about 12 hours long everywhere on Earth.
What is an equinox?
400
The movement of one object around another
What is revolution?
400
They had two different calendars, one with 365 days for everyday use and 260 days for religious uses.
What is Mayas?
400
It is summer in the Southern Hemisphere and winter in the Northern Hemisphere
What is December solstice?
400
The days when the sun is the farthest north or south of the equator
What is a solstice?
500
Earth has day and night because of its ____________ in 24 hours cycle in a day.
What is rotation?
500
The place where you can find the oldest existing observatory in the world.
What is Korea?
500
North and South Hemispheres receive the same amount of energy
What is March and September Equinoxes?
500
The study of the moon, stars and other objects in space