WONDER #2225: Are Days on Earth Getting Longer?

Question 1 of 3

Approximately 1.4 billion years ago, a day on Earth was how many hours long?

1. 12
2. 18
3. 20
4. 24

Question 2 of 3

What new statistical method combines astronomical theory with geological observation?

1. geostronomy
2. gastronomy
3. astrochronology
4. astrologicology

Question 3 of 3

The Moon is slowly moving away from Earth at a rate of how far each year?

1. 1.5 inches
2. 1.5 feet
3. 15 yards
4. 1.5 miles

Check your answers online at https://wonderopolis.org/wonder/are-days-on-earth-getting-longer.