Planets
Sizes and Distances
Heliocentric vs. Geocentric
Ancient Astronomers
Scientific Skills
100

This planet is known as the Red Planet.

What is Mars?

100
The smallest planet in the Solar System.

What is Mercury?

100

This model places the Earth at the centre of the universe.

What is the geocentric model?

100

This ancient Greek philosopher believed in the geocentric model.

Who is Aristotle?

100

The statement you test in an experiment. Sometimes called a prediction or guess about what will happen.

What is the hypothesis?

200

The largest planet in our Solar System is this one.

What is Jupiter?

200

The planet furthest away from the Sun.

What is Neptune?

200

This model, accepted today, places the Sun at the centre of the Solar System.

What is the heliocentric model?

200
Nicolaus Copernicus proposed this model of the Solar System.

What is the heliocentric model?

200

The list of steps you follow in an experiment.

What is the method?
300

Name the planet closest to the Sun.

What is Mercury?

300

The second largest planet in the Solar System.

What is Saturn?

300

Name the astronomer who first proposed the heliocentric model in the 16th century.

Who is Nicolaus Copernicus?

300

This is the invention that provided evidence for the heliocentric model.

What is the telescope?

300

A summary of the main results and their significance.

What is the conclusion.

400

This planet has a prominent ring system visible from Earth.

What is Saturn?

400

The distance light travels in one year.

What is a light year?

400

The geocentric model was widely accepted until this scientist provided evidence to support the heliocentric model using a telescope.

Who is Galileo Galilei?

400

This was the legal charge against Galileo for his work by the Catholic Church.

What is "vehemently suspect of heresy?"

400

The variable you change in an experiment.

What is the independent variable?

500

Which planet is often called Earth’s "sister planet" because of its similar size and structure?

What is Venus?


500

The distance to the nearest star outside the solar system (in light years).

What is 4.3 light years.

500

Explain one reason why the heliocentric model is superior to the geocentric model.

Because it accurately predicts the retrograde motion of planets and planetary orbits around the Sun.

500

Explain the evidence the Galileo found using his telescope.

- Jupiter's moons orbiting Jupiter

- The phases of Venus

500

Explain why it is important to ensure an experiment is a fair test.

If an experiment is not a fair test, you cannot be sure what produced the results. There should only be ONE independent variable, so you know it is the cause.