Gravity and Friction
Garth Wahl, Grade 5 and 6 Science Teacher
In a moment that seems likely to live forever in the annals of derring-do, Austrian daredevil Felix Baumgartner that rode a balloon to the edge of space, saluted and stepped off a platform 38 kilometres high with as much ease as any of us mere mortals might step off a curb.
The former soldier hurtled through the sky at up to more than 1300 km/h, breaking the sound barrier in a tumbling, gut-churning four-minute free fall before popping his parachute and making a running landing in the New Mexico desert. Then he fell to his knees and pumped his fists. The grade 5 classes watched this in excitement and some realizing how amazing science can be.
Asking students to work in small groups allows students to learn interactively. Small groups are good for:
※ Generating a broad array of possible alternative points of view or
solutions to a problem.
※ Allowing students with different backgrounds to bring their special
knowledge, experience, or skills to a project, and to explain their
orientation to others.
※ Giving students a chance to teach each other.
※ Giving students a structured experience so they can practice skills
applicable to professional situations.
Many of the groups brought their eggs to safety when they dropped their parachutes from the second floor. The activity was a success. The students learnt about gravity and friction. But most importantly, they had fun and learnt to work as a team which is a valuable life lesson.
Grade 5 重力與摩擦力
不斷挑戰人類體能極限的Flix在所執行的Red Bull Stratos任務中乘坐太空艙，以氦氣球拉升至12萬8000英呎之後，再以自由落體方式，一躍而下，孩子們都很驚訝他所達成的紀錄。