Question
Earth travels around the sun at a whopping 67,000 miles per hour. That’s 1.6 million miles every day, or 600 million miles a year. Earth moves in two ways: revolution and rotation. Revolution is the Earth’s orbit around the sun. Rotation is when Earth spins on its axis, creating day and night.
Each revolution of Earth around the sun takes one year, which is 365 days. But it actually takes Earth 365¼ days to get around the sun. We make up the difference every four years by adding one day to the calendar—February 29. These special years are called leap years.
As Earth revolves around the sun, it also spins, or rotates, on its axis, an imaginary line through the center of the planet. It takes one day for Earth to make a full rotation. The rotation of Earth is what causes day and night. As Earth spins, half of it always faces the sun. That half experiences daylight. The other half of the planet, meanwhile, faces away, and experiences darkness.
How often does a leap year occur?
A
Every two years
B
Every four years
C
Every six years
D
Every eight years
Each revolution of Earth around the sun takes one year, which is 365 days. But it actually takes Earth 365¼ days to get around the sun. We make up the difference every four years by adding one day to the calendar—February 29. These special years are called leap years.
As Earth revolves around the sun, it also spins, or rotates, on its axis, an imaginary line through the center of the planet. It takes one day for Earth to make a full rotation. The rotation of Earth is what causes day and night. As Earth spins, half of it always faces the sun. That half experiences daylight. The other half of the planet, meanwhile, faces away, and experiences darkness.
How often does a leap year occur?
A
Every two years
B
Every four years
C
Every six years
D
Every eight years
Answers
GPT-4o mini
B Every four years