Lasting Impressions: Making Models Activity Source: National Park Service Background Fossils are evidence of organisms that have lived in the past. A fossil can help us understand when and where organisms lived. Scientists can also use fossils to figure out what different environments were like in the past. One type of fossil is known as a mold fossil, which forms when an organism is buried, then decomposes, but the sediment keeps the shape (impression) of the organism. [Read More]

Locating Subsurface Energy Resources Activity Source: Society for Exploration Geophysicists Grade Levels: 6-12 Background Geophysical techniques are used to identify subsurface formations related to valuable energy resources, such as fossil fuels or geothermal sources, as well as rock layers that could be used for carbon sequestration. Each geophysical technique transmits a specific type of energy into the ground (e.g., electrical, magnetic, or mechanical) to create images of subsurface rock formations For example, seismic surveys send sound waves through the ground, and the reflection of these waves helps detect differences in the Earth’s subsurface (see video). [Read More]

Logs of Straw - Dendrocronology Activity Source: “Logs of Straw: Dendrochronology,” U.S. Geological Survey, 2002. Adapted with permission. Background Dendrochronologists use tree rings to go back in time to learn more about past climate. Using straws to recreate tree rings, you can learn how dendrochronologists work. Construct a 50-year climatic history on a three- meter time line. USGS Materials One set of straws with tree-ring markings: USGS One three-meter strip of adding machine tape for each group Colored pencils for each group Colored markers for each group A notebook for recording results (optional) Reference materials such as almanacs that provide students with dates of social and scientific events over the past four decades Procedure In groups of four, examine the set of straws that your teacher has prepared for you (by copying the Core Sample template onto the straws). [Read More]

Magnets at the Core Activity Source: From the Consortium for Ocean Leadership. Adapted with permission. Over time, Earth’s magnetic poles change strength and location. They also completely reverse directions episodically. The north magnetic pole is currently moving northwest at 40 kilometers per year. It moved from 81.3° N, 110.8° W in 2001 to 82.7° N, 114.4° W in 2005. (Learn more at www.ngdc.noaa.gov/geomag/faqgeom.shtml.) The strength and direction of Earth’s magnetic field at any time in geologic history is recorded by sediments and oceanic crust deposited or formed at that time. [Read More]

Making a Cave Activity Source: National Park Service. Developed by Kristen Lucke for the Views of the National Parks. Adapted with permission. Background We usually think of caves forming as rocks are dissolved and the particles are washed away, leaving hollow spaces behind. This activity simulates the way that dissolution, a chemical weathering process, leads to the formation of caves. When precipitation such as rainwater or snowmelt mixes with carbon dioxide from the air and from decaying plants in the soil, the result is carbonic acid. [Read More]

Making Your Own National Park Geologic Tour Activity Source: National Park Service, 2006. Adapted with permission. Background In this investigation, you’ll have the opportunity to learn about the many geological features in our country’s national parks. You might not realize this, but a large number of the national parks were created because of their amazing geology. Just think of the geological features of Yellowstone National Park, the Grand Canyon, Hawaii Volcanoes National Park, and many more! [Read More]

Mapping Quake Risk Activity Source: Esri. Adapted with permission. Today, people are “mapping our world” with the aid of Geographic Information Systems (GIS) technology. Mapping can be done in the field or the lab—even from smartphones. You can make maps with real-time data about wildfires, tsunamis, and tornadoes. You can make maps with imagery collected with visible light, infrared, and radar data. GIS helps people solve everyday problems in Earth science from coastal erosion on the local beach to global climate change. [Read More]

Mapping Vertical Movements Activity Source: UNAVCO By installing GPS stations that measure the movement of Earth’s crust, UNAVCO advances geodesy, the study of Earth’s shape, gravitational field, and rotation. Each station has a receiver antenna that communicates with satellites to measure, within millimeters, how Earth is moving. Some movements are horizontal, the sliding of tectonic plates. Some movements are vertical, as when Earth’s mantle either sinks or rebounds in a process called isostatic rebound. [Read More]

Mineral Electrical Conductivity Activity Source: Society for Mining, Metallurgy, and Exploration, Inc. Adapted with permission. People must mine minerals to provide all kinds of materials that we depend on in our lives. For example, wires and circuit boards used in electronics are made of mined minerals. Copper, which is refined from rocks containing copper sulfide and copper oxide, is the most common mineral used in electronics because it is an excellent electrical conductor. [Read More]

Mineral Identification Activity Source: Adapted from Women in Mining Education Foundation Education Activities Purpose To teach the student to identify minerals by observing and testing the physical properties of each mineral. Instructions Set up mineral stations for each mineral the students are to identify. If necessary, some stations may have two minerals to identify. Each station should be equipped with one each of the following items: Glass plate Penny Streak plate (white unglazed porcelain) Magnet Water Balance Scale Graduated cylinder (for specific gravity test) Steel Nail Divide students into equal groups. [Read More]