E
the northern and southern half of Earth
What are the hemispheres?
an invisible line that runs through the middle of a sphere
What is an axis?
what Earth does every 24 hours on its axis
What is a rotation?
the path the Earth takes around the Sun, or the Moon takes around the Earth.
What is an orbit?
Earth's complete travel around the Sun
What is a revolution?
what occurs because Earth orbits the Sun on a tilted axis.
What are season?
the type of "motion" of the Sun as it rises in the east and sets on the west
What is apparent motion?
what changes during the day but always points away from the Sun
What is a shadow?
Earth completes one spin every 24 hours
What is a rotation?
The temperature and the Sun's apparent path change very little at his location.
What is the equator?
A straight line through a geometric figure
What is an axis?
The path taken by one body around another.
What is an orbit?
One of two halves of the Earth as it is divided by the equator.
What is a hemisphere?
the force by which a planet or other body draws objects toward its center
What is gravity?
area where light from a light source is blocked by an opaque object
What is a shadow?
When the Sun's apparent path is higher in the sky and rises earlier in the day
What is summer?
the Sun's apparent path is lower in the sky.
What is winter?
A closed curve, consisting of all points whose distances from each of two fixed points
What is an ellipse?
longest in the morning and just before the Sun sets
What is your shadow?
A tool that provides evidence that the earth is rotating. It is made of a heavy weight hanging from a long wire which swings back and forth. The direction of the swinging ball appears to change due to Earth’s rotation.
What is the Foucault Pendulum?
An ancient model of the solar system which we know today is not correct. It puts earth at the center of the solar system and says that everything orbits around the earth. “Geo” means earth and “centric” means in the center. Today we know that the earth orbits around the sun.
What is the geocentric model?
The apparent shift of position of some stars through the year. This was not able to be explained by the Geocentric model which said that everything orbited the earth
What is Stellar Parallax?
A year with one additional day added. We have leap years every 4 years because one orbit of the earth around the sun is 365.25 days.
What is Leap Year?
An area on Earth that has a specific time that all people living there can set their clocks to. There are 24 on Earth.
What is a time zone?
An ancient tool used to tell time during the day. Part of it casts a shadow onto a flat surface marked in hours. It works due to Earth’s rotation.
What is a Sundial?