Match the following contributions/investigations in Column A to the Philosophers and Astronomers in Column B.

COLUMN A

COLUMN B

_____1. He estimated the circumference of the Earth. _____2. He concluded that Earth had a curved surface. _____3. He showed that the universe was spherical andfinite. _____4. He concluded that the sun was at the center of the universe. _____5. He first proposed an idea about the sphericity of the Earth. _____6. He proposed that Earth revolves around the sun in a circular path. _____7.He educated his students on the sphericity of Earth but made no justifications. _____8. His model explained that Earth was at the center and the sun and the moon revolve around it. _____9.He was first to explain an apparent change in the movement of the planet through the sky. _____10. He assumed that Earth was at the center of the universe while the other celestial bodies revolved around it.

a. Plato b. Aristotle c. Pythagoras d. Eratosthenes e. Tycho Brahe f. Eudoxus of Cnidus g. Ferdinand Magellan h. Nicolaus Copernicus i. Claudius Ptolemaeus j. Aristarchus of Samos

I. CLASSIFICATION: Read and analyze the statements carefully. Classify the following according to its type of motion:

TERRESTRIAL (NATURAL MOTION)

TERRESTRIAL (UNNATURAL or VIOLENT MOTION)

CELESTIAL MOTION

PRECESSION OF EQUINOXES

DIURNAL MOTION

ANNUAL MOTION

________1. Pushing a book along a table.

________2. Revolution of the Earth around the sun.

________3. The sun rises in the east, crosses the sky, and then sets in the west.

________4. It is the motion along the ecliptic plane or the plane of Earth's orbit.

________5. Stars appear to move counter clockwise on the surface of a huge sphere.

________6. The rock was worn down by the flowing river and turned into soil overtime.

________7. It is a west to east motion that will be completed in 23 hours and 56 minutes.

________8. It is the motion that affects the direction of Earth's axis and the time of theyear.

________9. All the stars, planets, and the Sun and the Moon move once a day across the sky.

________10. It is the motion of the sky which brings in new constellations as the year progresses.