The Solar System: changing ideas

What was Ptolemy right about?

• The earth is flat

• The earth is a sphere

• The sun is the centre of the solar system

• The earth is the centre of the solar system

What was Brahe right about?

• The sky is not fixed and can change

• The earth is a sphere

• The sun is the centre of the solar system

• The earth is the centre of the solar system

Copernicus was the first person to suggest what?

• The sky is not fixed and can change

• The earth is a sphere

• The sun is the centre of the solar system

• The earth is the centre of the solar system

What did Kepler prove?

• The sky is not fixed and can change

• The earth is a sphere

• The sun is the centre of the solar system

• The earth is the centre of the solar system

Which of these is not one of the four elements, according to Plato?

• Earth

• Air

• Lava

• Water

What was Ptolemy wrong about?

• The earth is flat

• The earth is a sphere

• The sun is the centre of the solar system

• The earth is the centre of the solar system

What is retrograde motion?

• The planets appear to slow down as they move near earth

• The planets appear to move "backwards" in the sky

• The planets move in circles around the sun

• Planets move faster when they are near the sun

Copernicus was born in what is now

• Poland

• Germany

• Italy

• Denmark

Copernicus's model is called the....

• Geocentric model

• Heliocentric Model

• Epicycular model

• Flat earth theory

What shape did Kepler say orbits were?

• Circular

• Parabolic

• Hyperbolic

• Elliptical