EARTHSC 1G03 Midterm: Environmental Science 1G03 Midterm 1 Review.docx

• School: McMaster University
• Department: Earth Sciences
• Course: EARTHSC 1G03
• Professor: Maureen Padden

Document Summary

The scientific method: a systematic approach to problem solving through, systematic operation and experimentation. A potential solution to a problem is called a hypothesis. Step 2: collection of facts that support/challenge assumptions. Step 6: keep checking facts against all possible hypothesis. Uniformitarianism: the present is the key to the past . Means that past geological events can be explained by forces occurring today. Origin of the solar system: a huge rotating cloud of dusts and gases (nebula) begins to contract. Most of the material is gravitationally pulled toward the centre, making the sun. Some dust and gases orbit the central body as a flattened disk. The dust and gases orbiting the central body slowly form planetesimals. Constant collisions caused repeated melting and colliding bodies were too small to hold their own atmosphere. Was mostly liquid but over time it cooled down. Made of granitic rocks, rich in si, al, na and k elements. (light weight elements).