Seasons
The Earth is tilted this many degrees on its axis
23.5 degrees
This word describes Ptolemy's "earth- centered" theory of the universe
Geocentrism
The change in society caused by the theory that the Earth was the center of the universe is known as....
The Copernican Revolution
When an object, like Earth, spins around on its axis.
What is rotate?
This German astronomer discovered that planets orbit the Sun in ellipses, not perfect circles.
Who is Johannes Kepler?
Two things that are responsible for Earth's seasons...
Earth's tilt and orbit around the sun
This word describes Copernicus theory of the "sun- centered" universe
Heliocentrism
The imaginary line dividing the Northern and Southern Hemispheres.
What is the equator?
The imaginary line running through Earth from the North Pole to the South Pole, around which Earth spins.
What is an axis?
This event marks the longest day of the year in the Northern Hemisphere.
What is the summer solstice?
During summer, in the northern hemisphere, the Earth is tilted...
Towards the sun
This astronomer discovered craters on the moon and made detailed observations of four of Jupiter's moons
Galileo Galilei
Lines that run east/west and measure distance north or south of the equator.
What is latitude?
When an object, such as Earth, travels in a path around another object, like the Sun.
What is revolve?
Launched by NASA in 1990 this telescope captures detailed images of distant galaxies, nebulas, and stars...an idea that other galaxies exist beyond the Milky Way.
What is the Hubble Space Telescope
Twice a year, the number of daylight and nighttime hours is equal, these dates are known as the Spring and Fall _____________________.
Equinox
This astronomer believed that the earth was the center of the universe, but his greatest contribution to astronomy was his detailed observations of the sky
Tycho Brahe
Lines that run north/south and measure distance east or west of the prime meridian.
What is longitude?
The time it takes Earth to make one full loop around the Sun.
What is a revolution?
Early astronomers called these "wandering stars".
Planets
This word describes the first day of Winter and the first day of Summer....
What is a Solstice
This English scientist's observation involving an apple helped him figure out that gravity is the force pulling objects toward the earth.
Who is Isaac Newton
A force that keeps everything in orbit around the sun.
What is gravity?
The slightly oval-shaped path that Earth follows as it goes around the Sun.
What is an orbit?
The force of gravity depends on the _ _ _ _ of objects and the distance between them.
Mass