Foucault Pendulum and Earth's Rotation

The video explains Earth's rotation, its axis, and the difference between sidereal and solar days. It discusses evidence of Earth's rotation, including day and night cycles, the Coriolis effect, and Foucault's pendulum. The Coriolis effect causes projectiles to follow curved paths due to Earth's rotation, while Foucault's pendulum demonstrates rotation through its swinging motion.

What is the imaginary line around which Earth rotates called?

• Equator

• Axis

• Meridian

• Latitude

How long does it take for Earth to complete one full rotation?

• 12 hours

• 48 hours

• 23 hours and 56 minutes

• 24 hours

What is the main difference between a sidereal day and a solar day?

• A sidereal day is longer than a solar day

• A solar day is shorter than a sidereal day

• A sidereal day is the time it takes for Earth to orbit the Sun

• A solar day is the time it takes for Earth to face the Sun again

Which of the following is evidence of Earth's rotation?

• The tides

• Day and night cycle

• The phases of the moon

• The changing seasons

What is the Coriolis effect?

• The deflection of moving objects due to Earth's rotation

• The bending of light in the atmosphere

• The change in wind patterns due to temperature differences

• The gravitational pull of the moon

In which direction are projectiles deflected in the northern hemisphere due to the Coriolis effect?

• To the left

• Downwards

• To the right

• Upwards

What happens to a projectile's path when fired on a rotating Earth?

• It moves faster

• It slows down

• It curves due to Earth's rotation

• It travels in a straight line

What does Foucault's pendulum demonstrate?

• The orbit of Earth around the Sun

• The rotation of Earth

• The gravitational pull of the moon

• The tilt of Earth's axis

How does Foucault's pendulum prove Earth's rotation?

• By moving faster over time

• By stopping after a few swings

• By changing direction as Earth rotates beneath it

• By swinging in a straight line

What pattern does a Foucault pendulum create over time?

• A spiral

• A star shape

• A straight line

• A circle