Earth Motions

Geocentric vs. Heliocentric Models Watch the video and then answer the questions below. Match the proper word with the description. Geocentric Earth is at the center of our solar system Heliocentric The sun in at the center of our solar system Geo- Earth Helio- Sun -centric center Sort the descriptions to the proper model of the solar system! Click on the description and a drop down menu appears Heliocentric Model Copernicus proposed this idea the sun is at the center planets revolve around the sun earth revolves around the sun the correct model of the solar system Planets travel in elliptical-shaped orbits Stars are stationary Day and night is caused by Earth's rotation Geocentric Model Aristotle proposed this idea the Earth is at the center planets revolve around the Earth the sun revolves around the Earth 1st but wrong model of the solar system Planets travel in circular orbits Stars move Day and night is caused by the Sun revolving around the Earth Click on the blank and choose the best word to complete the statement from the drop-down list. There are two theoretical models of the solar system. The first one is the geocentric model. In this model, all objects in the solar system move around the Earth and the Earth does NOT move. The Coriolis Effect and the Foucault Pendulum proved that the geocentric model is incorrect and the Earth rotates. The Sun is the central body of the heliocentric model in which the Earth and the planets, asteroids, comets and meteoroids orbit the Sun. The appearance of different constellations during each month, such as the zodiac constellations prove the heliocentric model. Earth is constantly moving. It rotates (spins) on a tilted axis in a counter clockwise direction (west to east). One rotation takes approximately 24 hours or 1 day. Evidence for rotation is based on terrestrial (Earth) observations. The Foucault Pendulum appears to change its direction of swing as Earth rotates beneath it. The Coriolis Effect causes winds and ocean currents to curve to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. Some of the effects caused by Earth's rotation are day and night, and sunrise and sun set. Celestial objects such as the Sun, stars and Moon appear to move westward across the sky at a rate of 15 degrees the same as Earth's rate of rotation. The time of day changes as Earth rotates. The axis of rotation is tilted 23.5 degrees and points to the North Star or Polaris. The stars that are near Polaris do not appear to rise or set. Instead they make circular star trails around Polaris each day. These stars are referred to as circumpolar. Other stars, such as the Sun, appear to rise and set each day. Earth revolves around the Sun. Earth's period of revolution is 365 1 days. The direction of of revolution is counter clockwise. Earth revolves approximately 1 degree Our path around the Sun is not a perfect circle, it is an ellipse. Rotation and Revolution Use your unit note to help complete the table by selecting the word from the word bank that best completes each space on the table. Description Rotation Revolution definition turning or spinning around an imaginary axis moving around another object; orbiting direction of.... counter-clockwise; west to east counter-clockwise period of... 24 hours or 1 day 365 1 days or 1 year rate of... (express as degrees per time) 15 degrees (360 degrees hours) 1 degree (360 degrees days) evidence (s) for... Day and Night, Star Trails, Foucault Pendulum and Coriolis Effect Changing seasons and constellations How does the HELIOCENTRIC model explain the rising and setting of the Sun? Planets orbit the Sun. Sun orbits the Earth. Earth spins around an imaginary axis The stars are stationary. How does the GEOCENTRIC model explain the rising and setting of the Sun? Planets orbit the Sun. Sun orbits the Earth. Moon orbits the Earth The Earth rotates around an imaginary axis Which object orbits the Earth in BOTH the Geocentric and the Heliocentric model? Sun Moon Stars Venus In the geocentric model, which motion would occur? Earth revolve around the sun. Earth would rotate on its axis. The Moon would revolve around the sun. The Sun would revolve around the Earth. The apparent rising and setting of the sun as seen from Earth are caused by the rotation of the sun. rotation of Earth. revolution of Earth. revolution of the sun. Which planetary orbit model allows scientist to predict the exact positions of the planets in the night sky for many years? The planets' orbits are circles in a geocentric model. The planets' orbits are ellipses in a geocentric model. The planets' orbits are circles in a heliocentric model. The planets' orbits are ellipses in a heliocentric model. The Foucault pendulum provides evidence of Earth's rotation. revolution. insolation. On Earth, surface ocean currents rotation clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere because of the Coriolis Effect. Seasonal Effect. Tidal Effect. Doppler Effect. Which statement provides the best evidence that Earth revolves around the sun? The sun follows an apparent daily path, rising in the east and setting in the west. A Foucault pendulum appear to shift its direction of swing in a predictable manner. The stars appear to follow circular paths around North Star (Polaris). The seasons of spring, summer, fall and winter repeat in a pattern. When observed from a location in New York State for an entire night, the North Star (Polaris) appears to rise in the east and set in the west. rise in the west and set in the east. move southward along an arc-shaped path. remain stationary in the sky. The star Sirius is observed in the evening sky during the month of January. At the end of 3 hours, Sirius will appear to have moved 60o 45o 3o 0o