TED-ED: The Sun's surprising movement across the sky - Gordon Williamson

TED-ED: The Sun's surprising movement across the sky - Gordon Williamson

Assessment

Interactive Video

Other, Geography, Science, Physics

KG - University

Hard

Created by

Quizizz Content

FREE Resource

The video explores the Sun's analemma, a figure-eight pattern formed by photographing the Sun at the same time each day over a year. It explains how Earth's axial tilt and orbital eccentricity contribute to this pattern. The Earth's tilt causes seasonal changes, while its elliptical orbit affects solar time, leading to discrepancies between sundials and clocks. Historical methods of timekeeping relied on the Sun's position, but modern clocks use the equation of time to adjust for these differences. The analemma's appearance varies by location and can differ on other planets due to their unique orbits and tilts.

Read more

5 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary reason for the different seasons on Earth?

The Earth's rotation speed

The Earth's axial tilt

The Earth's distance from the Sun

The Earth's gravitational pull

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why does the Sun's analemma form a figure-eight pattern instead of a straight line?

Due to the Earth's rotation speed

Due to the Earth's axial tilt

Because of the Earth's orbital eccentricity

Because the Earth is a perfect sphere

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the term for the point when Earth is closest to the Sun?

Perihelion

Equinox

Solstice

Aphelion

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How did people historically determine the correct time before modern clocks?

By observing the Moon's phases

By using the position of the stars

By relying on the Sun's position

By using water clocks

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the equation of time help to convert?

Solar time to sidereal time

Clock time to lunar time

Apparent solar time to mean time

Mean time to apparent solar time