Unit 2: Earth's Place in the Universe

This unit allows students to trace the methods through which cosmologists develop models of the universe, galaxies, solar systems, and planets like Earth. First, students use models of the Milky Way galaxy to understand the position and motion of our solar system within it. They use simulations to understand the evidence used to study the structure and processes in the universe including evidence that supports the Big Bang theory. Students study nuclear fusion as it occurs within stars. They research how fusion creates energy and other elements, and relate that production to the composition of matter on Earth and the transference of solar energy to Earth. Students develop an understanding of how matter and energy in the universe directly affect Earth systems, including the nature of solar wind, solar flares and sunspot cycles. They relate their understanding of solar activities to phenomena on Earth.

1. What evidence and experimental methods help us understand the structure and origin of the universe?
2. How does the formation of Earth relate to the formation of our galaxy?
3. What is the origin of the energy that powers stars and reaches Earth?
4. How are elements and energy produced by stars?