Solar System

One complete revolution of the Earth takes about one _____.

• year

• day

• month

• season

Earth spinning on its axis is called ______.

• orbit

• rotation

• revolution

• retrograde rotation

The time it takes a planet to make one complete trip around the Sun is called its ______.

• day

• axis

• period of revolution

• period of rotation

Which scientist believed that the Earth was at the center of the solar system and the orbits were circular shaped?

• Kepler

• Copernicus

• Ptolemy

• Aristotle

How many days does it take the Earth to make one complete revolution?

• 365 1/4

• 364

• 366

• 365

During leap year, an extra day is added to which month?

• January

• March

• February

• December

What causes the Earth to have seasons?

• The tilt of the Earth's axis

• The revolution of the Earth around the Sun

• The tilt of the Earth's axis and the revolution of the Earth around the Sun

• The distance of the Earth and the Sun

The Earth is tilted at an angle of ______.

• 23°

• 23.5°

• 45°

• 90°

The longest day of the year in the northern hemisphere occurs during which month?

• June

• March

• September

• December

Which scientist had the correct theory about how the solar system is arranged?

• Aristotle

• Ptolemy

• Copernicus

• Kepler