Move the sun, earth, moon and space station to see how it affects their gravitational forces and orbital paths. Visualize the sizes and distances between different heavenly bodies, and turn off gravity to see what would happen without it!

How do greenhouse gases affect the climate? Explore the atmosphere during the ice age and today. What happens when you add clouds? Change the greenhouse gas concentration and see how the temperature changes. Then compare to the effect of glass panes. Zoom in and see how light interacts with molecules. Do all atmospheric gases contribute to the greenhouse effect?

This straightforward calculator provides conversions from one unit of energy to the equivalent amount of CO2 emission expected from using that amount.

This is an interactive table with a comprehensive list of 29 greenhouse gases, their molecular structures, a chart showing a time series of their atmospheric concentrations (at several sampling sites), their global warming potential (GWP) and their atmospheric lifetimes. References are given to the data sets that range from the mid-1990s to 2008.

The Greenomes site is part of a laboratory- and Internet-based curriculum to bring college students up to the minute with modern plant research. Plant molecular genetic and genomic research still lags behind medically-oriented research on microbes and higher animals. As a result, there are relatively few lab experiences that expose college-level students to the growing insights into plants offered by genomic biology.

In spring 2020, the world was hit by a pandemic that spread globally by March, causing universities and most of the world to move to remote means. Summer field camps, long hailed as a rite of passage in the geosciences, were cancelled throughout the US. The community moved quickly, with NAGT developing remote learning tools and arranging for sharing and collaboration between instructors and institutions. As such, UNAVCO (GETSI) and University of Northern Colorado embarked on a data collection campaign for a summer field course entitled "Geoscience Field Issues Using High-Resolution Topography to Understand Earth Surface Processes" -- originally slated for in-person teaching. The team collected GNSS data, drone imagery for use in structure from motion, and terrestrial laser scanning from a site near Greeley, Colorado on the Poudre River. This assignment uses real-time kinematic GNSS methods to establish a ground control points used in Sheep Draw Structure from motion activity.
Day 3 Part 1 - This activity is part of the 2-week remote field course Geoscience Field Issues Using High-Resolution Topography to Understand Earth Surface Processes

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Compiled by Kyle Gray, University of Akron, 'krg10@uakron.edu' and David N. Steer, University of Akron, 'steer@uakron.edu'

(Note: this resource was added to OER Commons as part of a batch upload of over 2,200 records. If you notice an issue with the quality of the metadata, please let us know by using the 'report' button and we will flag it for consideration.)

This towing lab students use a active learning activity to develop planning, problem solving and conceptual skills to clarify understanding of applied and net force. The assessment is the correct composition of a vector diagram.

The Hangman game in Java. Students will learn how to read inputs from the keyboard, how to print outputs, and how to repeat a task using loops.

A free game that students can play at home or at school. Breaking Harmony introduces the concepts of fake news and misinformation.

Students will examine a number of household environmental hazards and connect the relationship of these hazards to one's health. Students will research solutions for reducing the health risk(s) to humans and/or pets.

The activities and video presented allows the kids to learn about healthy lifestyles and what their future could look like if they were to stat making bad decisions now.

This model shows how the size of an object affects how much heat energy it holds and hence how much is needed to heat it up or cool it down. You can explore this by watching the heat transfer between two objects with different sizes and different temperatures.

This model shows how specific heat of an object determines how much heat energy it holds and hence how much is needed to heat it up or cool it down. You can explore this by watching the heat transfer between two objects with different specific heats and different temperatures.

Students learn the basic relationship of Snell's Law, practice applying it to a situation, then are given another situation where it "doesn't work."??? This situation turns out to be one in which total internal reflection occurs. Students are then shown what happens with classroom apparatus.

A web page and interactive applet illustrating the properties of a hexagon (6 sided polygon). The applet shows a hexagon where the user can drag any vertex to reshape it. User can see that the interior and exterior angles are constant in a regular hexagon, but vary in an irregular version. Controls allow the display or hiding of the diagonals, and triangles within the hexagon. The web page lists the properties of a hexagon including interior angles, exterior angles, sum of exterior angles, area, number of diagonals and number of internal triangles. Links to pages with generalized properties of all polygons. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

For almost 300 years, leaders of the North African Barbary States hired ship captains to capture foreign ships in the Mediterranean Sea and Atlantic Ocean.

These captains, known as corsairs, kept the ships and cargo, then ransomed the crew or forced them to work in captivity.

This practice was a way for these semi-independent states of the Ottoman Empire to generate money. Some wealthy countries, such as Great Britain, would sign treaties with or make payments to the Barbary States, permitting their merchants to travel the seas freely. These cash payments and preferential trade agreements were called tributes.

When the United States gained its independence in 1783, it lost the protection of the British navy, and Barbary corsairs captured two American ships in 1785. As a new nation with limited revenue to support its government, the United States had limited funds to pay tribute and many Americans opposed it on principle. In 1793, Algerine corsairs captured 11 more American ships and 100 citizens, prompting a commercial and humanitarian crisis that could not be ignored.

With no navy or substantial annual revenue, how could the United States pay hefty ransom fees and prevent this from happening again?

Would the Barbary States even agree to negotiate terms when they clearly had the upper hand?

By the 1830s, independence movements reduced Spain’s colonies to Cuba and Puerto Rico in the Caribbean, the Philippines, and several smaller islands in the western Pacific Ocean including Guam, the Marianas, and the Marshall Islands.

At the same time, the United States was increasing its global diplomatic presence and economic power, warning European countries throughout the 19th century from attempting to recolonize countries in the Western Hemisphere.

Meanwhile, the American public read newspaper reports of severe Spanish treatment of revolutionaries in Cuba and the Philippines. Many in the United States wanted to go to war against Spain because of these atrocities, and others wanted to use it as an excuse to expand America’s territory. Some wanted to help Cuba become a free and independent country while some wanted the United States to replace Spain and take control over Cuba, as well as the Philippines, to increase its global military and economic power. All could agree that America’s commercial investments in the regions must be protected.

The United States sent the USS Maine battleship to Havana Harbor to protect its citizens and interests in the Spanish-Cuban conflict. On the night of February 15, 1898, an explosion rocked the ship which eventually sank, killing 266 sailors.

While unclear if this was an attack or accident, the press in the United States blamed Spain immediately, and war between the United States and Spain seemed inevitable.

Could the Spanish keep a stronghold on their last colonies or will the Cuban and Filipino people gain independence?

The Suez Canal was completed in 1869 to connect the Mediterranean and Red Seas, creating an essential waterway for global trade, as ships no longer had to navigate around the Horn of Africa.

At the time it opened, the canal was 164 kilometers, or roughly 100 miles, long. Without the canal, the circumnavigation around Africa is 9,654 kilometers or 6,000 miles. For most of its existence, the canal was managed by the Suez Canal Company which was owned by Great Britain and France.

On July 26, 1956, Egyptian president Gamal Abdel Nassar nationalized the canal, intending to take control of the canal’s operation and its revenue.

The world was still recovering from World War II with new national border conflicts and the onset of the Cold War. Many nations depended on the Suez Canal, especially Great Britain and France.

How would they manage their economic and political interests while avoiding conflict?

How would the United States and the Soviet Union support Nassar’s quest for Egypt’s sovereignty and Israel?

How would Great Britain, France, the United States, Israel, and the Soviet Union manage their own economic and political interests while avoiding military conflict?

How would Egypt preserve its national sovereignty?

In this historical scenario, students will have to overcome differing national interests to maintain global security and peace. The exercise will develop skills in leadership, collaboration, composure, analysis, communication, awareness, management, innovation, and advocacy.

An interactive applet and associated web page that show the definition of a horizontal line in coordinate geometry. The applet has two points that the user can drag which define a line. The line flagged when it is horizontal (slope=0) and the equation of the line is shown. The grid, details and coordinates can be turned on and off. The applet can be printed exactly as it appears on the screen to make handouts. The web page has a discussion on how to test for horizontal, the line equation and has links to other pages relating to coordinate geometry. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.