Curated OER
Shelter/Refuge
Students research shelters and places of refuge for animals and humans. In this shelters lesson, students read paragraphs about animal and human shelters. Students complete an activity about beavers and shelters. Students then complete a...
Curated OER
Astronauts Train in Deep-Space Brine
Students examine an article on astronauts training in deep space brine then discuss what they learned. For this investigative lesson students get into groups and design an exercise that includes isolation, silence and conflict resolution.
Curated OER
The Physical Setting
Ninth graders study the configuration of atoms in molecules to see that it determines the molecule's properties. In this chemistry instructional activity students divide into groups and complete their assigned task.
Science Buddies
Science Buddies: Gears Go Round!
Music boxes, bicycles, and clocks all have one thing in common: GEARS. You might say that gears make the world turn, since they are in so many mechanical instruments. How do they work and how do you know which gears to use? Find out in...
Science Buddies
Science Buddies: Hey Gear Heads! The Physics of Bicycle Gear Ratios
Here's an abstract of a project from Science Buddies that asks you to experiment with bicycle gears and the circumference of the wheel to determine revolutions per minute.
TeachEngineering
Teach Engineering: Gears: Lift It Up!
In this activity, students learn about the trade-off between speed and torque when designing gear ratios. The activity setup includes a LEGO pulley system with two independent gear sets and motors that spin two pulleys. Each pulley has...
TeachEngineering
Teach Engineering: Get in Gear
Students discover how gears work and how they can be used to adjust a vehicle's power. Specifically, they learn how to build the transmission part of a vehicle by designing gear trains with different gear ratios.
TeachEngineering
Teach Engineering: Gears: Determining Angular Velocity
Students work as engineers and learn to conduct controlled experiments by changing one experimental variable at a time to study its effect on the experiment outcome. Specifically, they conduct experiments to determine the angular...
TeachEngineering
Teach Engineering: What Are Gears? What Do They Do?
Students are introduced to an important engineering element- the gear. This prepares them to apply this knowledge in four associated activities in order to create successful solutions to design challenges that use LEGO MINDSTORMS NXT...
Technology Student
Technology Student: Gears and Pulleys
This site describes the basics of gears and pulleys, and their use in simple machines.
TeachEngineering
Teach Engineering: Wide World of Gears
In an interactive and game-like manner, students learn about the mechanical advantage that is offered by gears. By virtue of the activity's mechatronics presentation, students learn to study a mechanical system as a dynamic system under...
PBS
Pbs Learning Media: Cyberchase: Bianca Gets in Gear
Bianca visits a bike shop and learns how bicycle gears work in this Cyberchase video segment. [3:26]
Learn Engineering
Learn Engineering: Spur Gear Design
Understand the design criteria that should be met by any gear design to meet the American Gear Manufacturers Association standards. The accompanying video discusses how the design inputs (power transmitted, space constraints, and...
Other
Hognosesam: Pulleys and Gears
This site gives a small amount of space to pulleys, and then provides a wealth of information about gears.
Concord Consortium
Concord Consortium: Molecular Workbench: Molecular Planetary Gears
Observe the movements of a molecular planetary gear.
Concord Consortium
Concord Consortium: Molecular Workbench: Nano Differential Gears
View a hypothetical model of gears created be intermolecular interactions.
Other
D&t Online: Gears
This site illustrates how gears work and how they are used in simple machines.
Exploratorium
Exploratorium: Drives and Gears
Discover the basic structure of the bicycle chain drive system, and find out how it has developed over the years.
TeachEngineering
Teach Engineering: The Claw
Students learn about gear ratios and power by operating toy mechanical cranes of differing gear ratios. They attempt to pick up objects with various masses to witness how much power must be applied to the system to oppose the force of...
TeachEngineering
Teach Engineering: Tug of War Battle Bots
Students are introduced to the concepts of torque, power, friction and gear ratios. Teams modify two robotic LEGO vehicles by changing their gear ratios, wheel sizes, weight and engine power, while staying within a limit of points to...
TeachEngineering
Teach Engineering: Hare and Snail Challenges
Students extend the ideas learned in the maze challenge in this unit with a focus more on the robot design. They learn how to design the gear train from the LEGO MINDSTORMS NXT servomotor to the wheel to make the LEGO taskbot go faster...
TeachEngineering
Teach Engineering: Master Driver
Students learn how rotational sensors measure distance, how mathematics can be used for real-world purposes, and about potential sources of error due to gearing when using rotation sensor readings for distance calculations.
TeachEngineering
Teach Engineering: Exploring Solar Power
This unit provides students the opportunity to explore methods engineers have devised for harnessing sunlight to generate power. Students will initially explore heat transfer and heat storage through the construction, testing, and...
TeachEngineering
Teach Engineering: Bumps and Bruises
Students learn about the role engineers play in creating protective gear for sports. Students then build a protective landing pad to catch a dropped egg without it breaking
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