Exam 2 Review Exam 2 Review For a list of the topics to be covered on Exam 2, click here. Examine the Answer Key for the following practice exam. The following questions have been extracted from old tests I have given in this class. Uranium 238 has a half-life of about 4 billion years.
Earthquakes occur a. in the magnetosphere.
The core of the Earth is liquid. The density of the core of the Earth is greater than the density of rocks at the surface. The motion of the Earth's core causes tides. The Earth's core is made mainly of iron and nickel. The Earth's core is hotter than the average temperature at the surface.