Contraction of Motor Units
In this biology activity, students examine the internal functions of the human body while considering the factors needed to explain the physiological reactions.
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Muscles – Organismal Level (Part 2)
Humans use 200 muscles to take one step — that's a lot of muscles! Learners see how skeletal muscles work to pull on bones, creating movement. The narrator then explores motor units, muscle twitches, impulses, contractions, and isotonic...
11 mins 9th - 12th Science CCSS: Adaptable
Lesson 2: Confronting Climate Change: Understanding
In the second of three lessons about climate change, young climatologists examine the local impacts of severe storms and drought on roads, rivers, buildings, and more. Through a series of investigations, learners begin to understand the...
6th - 12th Science CCSS: Adaptable