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Lesson 4.1 Vocab

bipedalism
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Definition

the ability to walk on two rear legs

Use In A Sentence

Bipedalism may have evolved in our ancestors from the need to see above the tall grasses of open plains.

collective learning
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Definition

the process, specific to the human species, of sharing and accumulating knowledge over multiple generations and across regions

Use In A Sentence

Only through collective learning were we able to develop the sophisticated technologies we have today.

evolution
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Definition

the process by which living organisms change over time due to DNA mutations and adaptation to the environment

Use In A Sentence

Once on the islands, the evolution of the finches' beaks happened fairly quickly.

foraging
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Definition

the act of searching for food and supplies

Use In A Sentence

It is midday, and you have paused your foraging activities to rest in the forest.

hominin
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Definition

all bipedal species in the human line since it diverged from the common ancestor with chimpanzees

Use In A Sentence

The flamingos lived near the shallow lakes in East Africa at the time of the earliest hominins.

symbolic language
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Definition

a form of communication that uses symbols to stand in for a greater meaning

Use In A Sentence

Symbolic language makes collective learning possible because it allows humans to share huge amounts of accumulated information from generation to generation.

Humanity’s New Complexity

Driving Question: How did human evolution lead to new complexity on Earth?

Humans communicate using complex language and pass information down across generations. But how did that happen? And why are we the only species that can do this?

Learning Objectives:

  1. Describe how our understanding of early humans has changed over time.
  2. Explain how complexity increased as humans evolved on Earth.
STEP 1

Opener: Humanity’s New Complexity

Teaching Tools

Prime your students for learning about early humans by tapping into their prior knowledge. Writing informally to explain why they agree or disagree with the statements in the Unit Notebook will prepare them for answering the driving questions at the end of the unit.

There are over 8 billion humans on Earth today. But how did our species, Homo sapiens, win the evolutionary race against other human species, such as Neanderthals?

STEP 2

Human Origins

Teaching Tools

Help students remember how to spot collective learning in the wild using these points:

  • Share it—Was the information/skill/tool shared with others?
  • Store it—Was it stored or preserved in some way?
  • Pass it on—Was it passed on to the next generation?
  • Improve on it—Was it improved upon by others?
STEP 3

Threshold 6

Teaching Tools

Before introducing students to Threshold 6: Collective Learning, have them review Thresholds 1–5 to see how complexity increases as they learn about the ingredients and Goldilocks Conditions for the evolution of early humans and collective learning.

Who were the ancestors of humans? What parts of us changed and what stayed the same as we evolved? This video and activity have answers!

Threshold 6: Collective Learning External link

A new species with the ability to use symbolic language evolved on Earth. This new species would alter the Earth for better and worse.
STEP 4

Closer: Humanity's New Complexity

Imagine there was one big book that covered the origin of human language. If you had the job of illustrating it, what would you draw on the cover?