University of Canterbury
University of Canterbury; Cs Unplugged: Text Compression
Learn how compressed formats such as zip, gzip, or gif images are all based on a method called Ziv-Lempel coding, which turns out to be an interesting exercise in finding patterns in text.
Science Buddies
Science Buddies: Image Compression
Compare the strengths and weaknesses of different digital image formats. How does the amount of compression affect a JPEG image? What happens when you save a JPEG image multiple times?
Science Buddies
Science Buddies: Under Pressure: Sand Under Lateral Compression
Here's a project that involves a different kind of sandbox than the ones you usually think of. This one has a moving wall inside, acting like a piston, to compress the sand. You can make layers using two different colors of sand, and...
Science Buddies
Science Buddies: Mp3 Squeeze: How Much Compression Is Too Much?
Do you love to listen to your MP3 player while you're exercising, or listen to songs on the Internet? The relatively recent development of MP3 technology has made it possible to take a stack of CD's and store them on a device no bigger...
TeachEngineering
Teach Engineering: Deformation: Nanocomposite Compression
Students learn about nanocomposites, compression and strain as they design and program robots that compress materials. Student groups conduct experiments to determine how many LEGO MINDSTORMS NXT motor rotations it takes to compress soft...
TeachEngineering
Teach Engineering: Bridge Types: Tensile & Compressive Forces
Students explore how tension and compression forces act on three different bridge types. Using sponges, cardboard and string, they create models of beam, arch and suspension bridges and apply forces to understand how they disperse or...
Khan Academy
Khan Academy: Lossless File Compression
Practice using lossless text and image compression algorithms and considering what data can be compressed most easily.
Khan Academy
Khan Academy: Lossy vs. Lossless Compression
Check your understanding of lossy and lossless compression techniques, in this set of free practice questions designed for AP Computer Science Principles students.
Khan Academy
Khan Academy: Lossless Bit Compression
Computers represent all data in binary, so all types of files, from text to images to videos, are ultimately sequences of bits. Regardless of whether the bits represent a document or a GIF, computers can use a bit compression technique...
Khan Academy
Khan Academy: Simple Image Compression
Lossless single image compression by using the algorithm run-length encoding (RLE).
Science Buddies
Science Buddies:testing Compression Waves
Here's a project for studying compression waves in different soil types. It uses a homemade wave tank for solids, with a frequency generator, amplifier, and loudspeaker as the vibration source. There are lots of interesting possibilities...
Physics Aviary
Physics Aviary: Practice Problems: Internal Energy in Isothermal Compression
Determine the internal energy in a sample of gas that goes through an isothermal compression.
NASA
Nasa: Gas Properties Definitions
Use this site to learn about basic gas properties including motion, viscosity, and compressibility. Includes links to activities for all ages.
Science Education Resource Center at Carleton College
Serc: Experimenting With Sound/compression Waves Through Vibration
Through inquiry, learners will use various objects/materials attached to strings to investigate how vibration causes sounds waves.
Science Buddies
Science Buddies: Beach Bum Science: Compression of Wet Sand
Did you ever notice the cool patterns around your footprints when you take a walk in the wet sand at the beach? The pressure of your feet has effects far outside your footprints. Here's a project that uses a simple experimental apparatus...
TeachEngineering
Teach Engineering: Bridging the Gaps
Students are presented with a brief history of bridges as they learn about the three main bridge types: beam, arch and suspension. They are introduced to two natural forces - tension and compression - common to all bridges and...
Read Works
Read Works: Transcontinental Railroads: Compressing Time and Space
[Free Registration/Login Required] Abridged from the full text located at the Gilder Lehrman Institute of American History, this passage provides information about the development of the transcontinental railroad. Paired texts, a text...
Annenberg Foundation
Annenberg Learner: Virtual Particle Lab: Compressibility of Air
Explore the particle model of matter. Run the simulations and see if you can predict the results.
CK-12 Foundation
Ck 12: Plix Series: Transformations: Compressibility
[Free Registration/Login Required] Observe what happens to volume as pressure is changed, and then answer a challenge question after the activity.
Physics Aviary
Physics Aviary: Practice Problems: Work Done in Adiabatic Compression Process
Determine the work that was done when no heat enters or leaves the system. A video describing the problem can be found here: https://www.youtube.com/watch?v=vt0u94PtbJ8&feature=youtu.be
TeachEngineering
Teach Engineering: Bone Crusher
Students use a tension-compression machine or an alternative bone-breaking setup to see how different bones fracture differently and with different amounts of force, depending on their body locations. Teams determine bone mass and...
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