The Floating Lithosphere - Isostasy part of Quantitative Skills:Activity Collection
Len Vacher, University of South Florida
Students are asked to numerically and then analytically determine the relations governing the depth of compensation.

Back-of-the-Envelope Calculations: Weight of Gold part of Quantitative Skills:Activity Collection
Barb Tewksbury, Hamilton College
Question Let's suppose that you have a shoe box full of water (the box is waterproof, of course). The shoe box weighs about 9 kg (19.8 pounds). Suppose you emptied the box and filled it completely with rock ...

Geologic Time Calculations part of Quantitative Skills:Activity Collection
Francisco San Juan, Elizabeth City State University
Radiometric age determination using parent/daughter composition and a radiometric decay curve.

Back-of-the-Envelope Calculations: The Distance Radio Waves Have Traveled part of Quantitative Skills:Activity Collection
Barb Tewksbury, Hamilton College
Question We have been broadcasting radio waves in all directions since the development of radio and television stations. How far could you be from the Earth and detect the faint signals of an early Star Trek ...

The Floating Lithosphere - Isostasy part of Quantitative Skills:Activity Collection
Len Vacher, University of South Florida
Students are asked to numerically and then analytically determine the relations governing the depth of compensation.

The Floating Lithosphere - Eureka! part of Quantitative Skills:Activity Collection
Len Vacher, University of South Florida
In this module, students examine Archimede's Principle in general and as it applies to Isostacy.

Back-of-the-Envelope Calculations: Communication with Mars part of Quantitative Skills:Activity Collection
Barb Tewksbury, Hamilton College
Question Suppose you were living in a Mars colony, and you wanted to call home to your parents on Earth. You say, "Hello! How are you?" How long do you have to wait until you hear them say, ...

Density of Rocks - Some Applications part of Quantitative Skills:Activity Collection
Len Vacher, University of South Florida
This module studies some applications of being able to determine the density of rocks.