如何策划我的乌镇之旅

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How does biking improve your health? This project will engage 3rd-grade students in investigating how biking impacts their health through hands-on, inquiry-based learning, while applying their learning to design a real-world solution. Students will explore how biking affects the heart, lungs, and muscles by collecting real data before and after exercise. They will develop models to represent how the body responds to movement and identify patterns in their findings. Students then apply their scientific understanding to design a "bike bus," a structured grouping system that helps students safely ride to school while also improving their health.

Paper Plate Folding Graphic Organizer Students can make a paper plate folding graphic organizer to demonstrate the carbon dioxide and oxygen cycle. Students will need two paper plates, a brass brad, and markers. Have the students stack the two plates on top of each other and insert the brass brad in the middle so one of the plates can spin. Cut off the outer one-inch rim of the top paper plate to expose the bottom plate’s rim. Draw a huge, curved, blue arrow labeled “Oxygen” going around half of the circumference of the bottom plate’s rim and a huge curved red arrow labeled “Carbon Dioxide” going around the other half of the circumference. On the top half of the top plate have the students draw a flower plant with the label “Photosynthesis.” On the bottom half of the top plate have the students draw any animal or human with the label “Respiration.” When the students turn the bottom plate, it will show the oxygen and carbon dioxide arrows continually being exchanged between the two processes.

Research how local power and energy storage facilities work and create a class presentation.

Rocket Fuel Use your favorite search engine to find a video of a rocket launch. Discuss with students the chemical reaction involved in rocket fuel and how it produces the rocket’s propulsion. Create a model rocket

Air Crushing a Can: The purpose of this activity is to relate unbalanced forces to fluids and pressure. This can be done as a demonstration or in groups. You’ll need an empty soda can, hot plate, bowl of cold water, and tongs. Follow these steps: 1. Place less than 20 mL of water into an empty soda can. 2. Use the hot plate to heat the water until boiling and let it boil for 30 seconds. 3. Remove the can from the hot plate using the tongs. 4. Quickly place the soda can upside down into the bowl of cold water. The pressure will increase inside the can when the water is boiled and converted to steam. When you quickly place it in the cold water, the steam condenses and a partial vacuum is created. The air pressure inside the can will then be significantly lower than the air pressure outside, and that outside air pressure will crush the can.

Change in immigration laws thoughout US History. Who was eligible then? Who is eligible now? Levels of difficulty