Earth Day
Earth Day is held on the same day each year, April 22nd. This year’s theme is Planets vs. Plastics, which is chosen annually by EarthDay.org. With Earth Day being this upcoming Monday, it creates an ideal opportunity to introduce the Earth Day theme and continue students’ understanding of this theme throughout the week!
Simple And Compound Machines
Learning Object — Video
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Video: Simple And Compound Machines
When 'Hardware Hal' holds a 'Simple and Compound Machines Sale' he demonstrates to his assistants the six simple machines: the lever, wedge, inclined plane, pulley, wheel & axle, and screw. Shows how these machines make work easier by changing force, direction, or distance. Machines in action and computer graphics illustrate the principles of work, effort, force, distance, power, friction, and much more.
Student Application
See the six simple machines: the lever, wedge, inclined plain, pulley, wheel and axle, and screw.
Learning Objectives
- Students will know that work is done when a force (effort) causes an object to move a distance. Work = Force x Distance.
- Students will understand that a machine is a tool that helps do work by reducing the effort that is required. Friction can slow a machine's ability to reduce effort.
- Students will reali...
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Supporting Activities
- Before viewing the video
- Anticipatory set: Have the children write down any simple machines that they know and draw diagrams of them. Collect and save for review after watching the video.
- After viewing the video
