Life on Planet Earth

Front

What is the actual size of Venus?

Back

12,104 km

Front

What is the scaled distance from the Sun to Mercury if the scale is 30 au = 21.7 cm?

Back

0.282 cm

Front

What is Earth's only natural satellite?

Back

Moon

Front

How many days does it take for the moon to complete a revolution around the Earth?

Back

27.3 days

Front

What is the average distance between the Earth and Sun measured in?

Back

Astronomical units

Front

What is the definition of an astronomical unit (AU)?

Back

The average distance from the Earth to the Sun, approximately 93 million miles or 150 million kilometers.

Front

What is the significance of the Moon for Earth?

Back

The Moon affects Earth's tides and stabilizes its axial tilt.

Front

What is the average distance from the Earth to the Moon?

Back

Approximately 384,400 km.

Front

What is the role of the Sun in the solar system?

Back

The Sun is the central star that provides light and heat, influencing the orbits of planets.

Front

What is the definition of a revolution in astronomy?

Back

A revolution is the movement of one object around another in an orbit.