The video explains how the Earth rotates on its axis and revolves around the Sun at a speed of 109,000 km/h. It takes 365.25 days for a complete revolution, leading to the addition of an extra day every four years, known as a leap year, resulting in 366 days instead of the usual 365.

What is the speed at which the Earth revolves around the Sun?

• 150,000 km/h

• 100,000 km/h

• 120,000 km/h

• 109,000 km/h

How many days does it take for the Earth to complete one revolution around the Sun?

• 365 days

• 365.25 days

• 364.5 days

• 366 days

What is the extra time accumulated each year due to Earth's revolution?

• 0.25 days

• 1 day

• 1.5 days

• 0.5 days

How often is an extra day added to the calendar to account for the extra time in Earth's revolution?

• Every 3 years

• Every 2 years

• Every 5 years

• Every 4 years

What is the total number of days in a leap year?

• 365 days

• 366 days

• 364 days

• 367 days