How Do We Know about Layers Deep within Earth?
Keycode: ES0402

What Time Is It?
Keycode: ES0405

Paper or Plastic—Which Type of Bag Is Better for the Environment?
Keycode: ESU201

Observe an animation showing the origin of the solar system.
Keycode: ES0401

Observe evidence of Earth rotating about an axis.
Keycode: ES0403

Explore a model of Earth's daily rotation.
Keycode: ES0404

Observe the view of the night sky from the same location over a year.
Keycode: ES0407

Explore a model of Earth's yearly revolution around the sun.
Keycode: ES0408

Learn more about how time is measured.
Keycode: ES0406

Learn more about methods of keeping time.
Keycode: ES0409

Careers for all chapters

Local Resources for Unit 2