Unit 2 - History of the Earth

• Level 4: In addition to score 3.0 performance, the student demonstrates in-depth inferences and applications that go beyond what was taught.
• Level 3: Student constructs an argument based on evidence about the relationship between changes in life on Earth, changes in the Earth’s surface and changes in the atmosphere throughout time. HS-ESS2-7
• Level 2:

A1. Student describes the atmospheric composition after Earth’s formation and how it changed throughout time.

A2. Student describes evidence for emergence of photosynthetic organisms

A3. Student describes the effect of the presence of oxygen (ozone layer) on evolution and chemical weathering.

A4. Student identifies causal links and feedback mechanisms between changes in the biosphere and other Earth systems

• Level 1: Student’s performance reflects insufficient progress towards foundational skills and knowledge.