Understanding Earth's Seasons

What causes Earth's seasons?

• The tilt of Earth's axis

• The distance from the Sun

• The speed of Earth's orbit

• The shape of Earth's orbit

When is Earth closest to the Sun?

• January

• March

• July

• September

What is believed to have caused the tilt of Earth's axis?

• A collision with a celestial body named Theia

• The gravitational pull of the Moon

• The rotation speed of Earth

• The distance from the Sun

What happens during the summer solstice in the Northern Hemisphere?

• The longest day of the year occurs

• The shortest day of the year occurs

• Day and night are equal in length

• The Sun is directly over the equator

What marks the beginning of spring in the Northern Hemisphere?

• March equinox

• June solstice

• September equinox

• December solstice