This video explores Milankovich Cycles, the nature of apsidal precession, and how Earth's orbital movements are connected to long-term changes in climate.
Students will learn about our calendar year, the wobble in Earth's axis, and changes in the Earth's orbit.
Under the video you'll find its transcript, and there is additional content linked on the left side.
If students log into Khan Academy, they can submit any questions or comments they have about the video.
Students need to understand the following terms: obliquity, axis, tilt, solstice, perihelion, and orbital eccentricity.
Students need to recognize that this video discusses natural climate changes over the course of tens of thousands of years.
The video pairs well with this NASA article about Milankovitch cycles.
Teachers could pause the video at certain moments in order to reinforce key concepts.
This video could supplement a lesson on the exact mechanics of Milankovitch cycles and why these cycles cannot explain Earth's current warming.
Teachers could create a formative assessment based on the main concepts of this video.
This resource video covers another aspect of Earth's orbital changes called apsidal precession, which is the change in the location of perihelion - the place in Earth's orbit where it is closest to the Sun. This resource is recommended for teaching.
Next Generation Science Standards (NGSS)
ESS1: Earth's Place in the Universe
HS-ESS1-4 Use mathematical or computational representations to predict the motion of orbiting objects in the solar system.
ESS2: Earth's Systems
HS-ESS2-2 Analyze geoscience data to make the claim that one change to Earth’s surface can create feedbacks that cause changes to other Earth systems.