Space - Lesson 3 - The Solar System

Who proposed the geocentric model with Earth at the center?

• Copernicus

• Galileo

• Aristotle

• Newton

What was lacking in Aristotle's time that made it difficult to justify the geocentric model?

• Mathematics

• Technology

• Philosophy

• Literature

Who proposed that the sun was at the center of the solar system, not the Earth?

• Galileo

• Kepler

• Copernicus

• Newton

What did Kepler determine about the orbits of planets in 1621?

• They were circular

• They were elliptical

• They were square

• They were triangular

Where is the Sun located in our solar system?

• At the edge of our solar system

• At the center of our solar system

• Outside our solar system

• In another galaxy

What effect does the Sun's gravity have on planets and celestial bodies?

• It pushes them away

• It pulls them into orbit

• It has no effect

• It makes them spin faster

Which of the following characteristics is true for inner planets?

• They have rings.

• They are gaseous.

• They have a rocky composition.

• They are larger than outer planets.

Which planet is not considered an inner planet?

• Mercury

• Venus

• Earth

• Jupiter

What is a common feature of inner planets?

• They are smaller.

• They have thick atmospheres.

• They are made of gas.

• They have many moons.

Which planet is closest to the sun?

• Venus

• Earth

• Mercury

• Mars