EAPS 106 Homework 1 (Purdue university)

Question 1 0.5 / 0.5 points 1.1. In Wikipedia, look up "Structure of Earth" and answer this question: Which layer of the Earth is a liquid? a. The crust b. The mantle c. The outer core d. The inner core Question 2 0.5 / 0.5 points 1.2. In Wikipedia, look up "History of Earth" and answer this question: How did the Earth form? a. By accretion from the solar nebula b. From material thrown out by a fast-spinning new Sun c. From a collision between two giant planets d. It is a rogue planet captured by the Sun Question 3 0.5 / 0.5 points 1.3. In Wikipedia, look up "Geothermal gradient" and answer this question: How did the Earth obtain the heat in its interior? a. From radioactive decay b. Residual heat from planetary accretion c. Latent heat from core crystallization d. All the above