Theories of the Solar System

What was the Ptolemy's theory?

• He thought Earth was in the center of the universe.

• He discovered galaxies beyond the Milky Way.

• He thought the sun was at the center of the universe.

• He thought the planets revolved around the sun in elliptical orbits.

What is the Heliocentric model?

• Earth-centered universe.

• Sun-centered universe.

• That the planets revolve around the sun in elliptical orbits.

• That galaxies exist beyond the Milky Way.

What was Copernicus's theory?

• He thought Earth was at the center of the universe.

• He thought the planets revolved around the sun in elliptical orbits.

• He thought the sun was at the center of the universe.

• He discovered galaxies beyond the Milky Way.

What is the Geocentric model?

• Sun-centered universe.

• Planets revolving around the sun in elliptical orbits.

• Galaxies existing beyond the Milky Way.

• Earth-centered universe.

What tool did Galileo use to make his discoveries?

• Satellite

• Telescope

• Space Shuttle

• Ancient buildings like Chicen Itza in Mexico.

What is the name of this model?

• Heliocentric Model

• Geocentric Model

• Circle Model

• Aristotle Model

Which of the following reasons best explains why scientists once thought other planets and the Sun revolved around Earth?

• Scientists long ago did not make careful observations and went on feelings alone

• Scientists long ago were not very intelligent.

• Scientific theories cannot explain many phenomena.

• Scientific theories are constantly being revised as new information and technology arises

What is the main difference between the heliocentric theory and geocentric theory of the solar system?

• The heliocentric theory has Earth as the center of the solar system, and the geocentric theory has the Sun as the center of the solar system.

• The heliocentric theory has the Sun as the center of the solar system, and the geocentric theory has the Earth has the center of the solar system.

• The heliocentric theory has Earth moving around the Moon, and the geocentric theory has the Sun moving around the Moon.

• The heliocentric theory has the Sun moving around the Earth, and the geocentric theory has Earth moving around the Sun.

Which theory or theories are accepted today?

• Geocentric

• Heliocentric

• Steady State Model

• Oscillating Model

• Big Bang Theory

The study of the sun, moon, stars, planets, comets, galaxies, etc.

• astronomy

• milky way

• solar system

• telescope