Understanding Earth's Shape

Front

Which Greek philosopher first proposed that the Earth is spherical?

Back

Pythagoras

Front

What evidence from a lunar eclipse supports the idea that the Earth is round?

Back

The Earth's shadow on the Moon is always round.

Front

Why do different stars appear in the night sky depending on location?

Back

The Earth is rotating on its axis.

Front

How did Aristotle use observations of ships to support the idea of a spherical Earth?

Back

He noticed ships disappear bottom-first over the horizon.

Front

Which of the following is NOT an observation used by the Greeks to prove Earth's shape?

• Lunar eclipses
• Changing star positions
• Ships disappearing over the horizon
• The presence of gravity

Back

The presence of gravity

Front

What modern technology relies on the Earth's spherical shape for accuracy?

Back

GPS (Global Positioning System)

Front

Who provided the most convincing observational evidence that the Earth is round during ancient times? Options: Pythagoras, Eratosthenes, Newton, Galileo

Back

Eratosthenes

Front

What did Eratosthenes do to estimate the Earth's circumference?

Back

Measured the length of a shadow at different locations

Front

Why do we experience time zones on Earth?

Back

The Earth is a sphere and rotates on its axis.

Front

How did the Greeks know the Earth was spherical?

Back

They conducted scientific observations and reasoning.