In this short demo/activity, a balloon with baking soda in it is stretched over the mouth of a flask or bottle containing vinegar. The balloon is tipped so that the baking soda falls into the vinegar, and the reaction creates carbon dioxide, which inflates the balloon. The activity is part of the children's book, The Air We Breathe.

This activity from the Department of Energy provides background information about solar ovens and instructions on building a simple model solar cooker.

Students will choose a physical place to study, a site that is close enough to visit at least four times during the quarter/semester. Using writing prompts, text-based research, and close observations in the "field" (the chosen place), students will create a "mashup" of spatially referenced pop-up balloons. These will include researched and narrative prose, citations and links, and some visual images, embedded into a map via Google Earth technology. Through this unique presentation, the research and writing can encourage viewers to better understand the place they have chosen to study.

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Marble Cattle. This is the Lesson 3 Digging Deeper activity, from Unit 2 Power, Structure and Technology, from the DIGS (Developing Individuals, Growing Stewards) AmeriCorps Curriculum from CSU. The curriculum focuses on introducing students in grades 3-5 to Colorado agriculture, industry and environmental issues. The curriculum is matched to State Standards 2021. The curriculum upon request. Visit: https://engagement.colostate.edu/programs-old/developing-individuals-growing-stewards/

MarketSim helps students understand the functioning of markets by having them become consumers and producers in a simulated economy. There are two versions, both implemented over the internet. Jeremy's market is a consumer barter market. Adam's market introduces firms and money. MarketSim received funding from the National Science Foundation. The simulation is most appropriate for economics principles courses. The principle developers are Tod S. Porter and Kriss Schueller at Youngstown State University.

This activity is a series of game-like lessons that assist the student in developing the logic skills needed to read mass spectrometer output and formulate the identity of an unknown molecule. As students endeavor to identify the unknown they must apply fundamental chemistry knowledge including formula mass, isotopes, periodic table, relative abundance, interpreting graphs, organic chemistry, ionization, bonding rules, and structural formulas. Based on an activity presented by Olaf Runquist, Professor, Hamline University.

A realistic mass and spring laboratory. Hang masses from springs and adjust the spring stiffness and damping. You can even slow time. Transport the lab to different planets. A chart shows the kinetic, potential, and thermal energy for each spring.

A realistic mass and spring laboratory. Hang masses from springs and adjust the spring stiffness and damping. You can even slow time. Transport the lab to different planets. A chart shows the kinetic, potential, and thermal energy for each spring.

Learn about position, velocity, and acceleration in the "Arena of Pain". Use the green arrow to move the ball. Add more walls to the arena to make the game more difficult. Try to make a goal as fast as you can.

This hands-on demonstration illustrates how GPS can be used to measure the inflation and deflation of a volcano. Volcanoes may inflate when magma rises closer to the surface and deflate when the pressure dissipates or after an eruption.

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When heat energy is transferred from a warm to a cold object, one cools down and the other warms up, but the total energy remains the same. This model allows you to watch this process and explore how to determine the final temperature.

Provenance: Avradip Ghosh, University of Houston-University Park
Reuse: If you wish to use this item outside this site in ways that exceed fair use (see http://fairuse.stanford.edu/) you must seek permission from its creator.
The poles of the Earth's magnetic field are not precisely aligned with the geographic north and south poles and, in fact, vary continuously. This activity introduces to students the Earth's magnetic field and how to measure the Magnetic Declination and Inclination at home with nothing but a smartphone. Every modern smartphone has an inbuilt 3-component magnetometer that it uses for efficient navigation. Using a free app called "Physics Toolbox Magnetometer", the smartphone magnetometer measurements can be accessed in real-time and measured. The activity involves taking measurements of the 3-components of the Earth's Magnetic field (Bx, By, and Bz) as a function of angle with respect to the Geographic North. By analyzing the data, one can obtain the Magnetic Declination, Inclination, and Magnetic Intensity (total magnetic field) of Earth's Magnetic field at the experimentation venue.

(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.)

Insert channels in a membrane and see what happens. See how different types of channels allow particles to move through the membrane.

Insert channels in a membrane and see what happens. See how different types of channels allow particles to move through the membrane.

A one page assignment that uses online tutorials to give students a first exposure to the components of a cell and membrane.

Explore what happens when a force is exerted on a metallic material. There are many different types of materials. Each material has a particular molecular structure, which is responsible for the material's mechanical properties. The molecular structure of each material affects how it responds to an applied force at the macroscopic level.

How do microwaves heat up your coffee? Adjust the frequency and amplitude of microwaves. Watch water molecules rotating and bouncing around. View the microwave field as a wave, a single line of vectors, or the entire field.

How do microwaves heat up your coffee? Adjust the frequency and amplitude of microwaves. Watch water molecules rotating and bouncing around. View the microwave field as a wave, a single line of vectors, or the entire field.