美国STEM课程Touchdown宇宙飞船着陆讲述.pptx

Touchdown飞船着陆 STEM课程 Touchdown Lesson This STEM lesson could come before or during a science unit of study about Gravity, Shock-Absorbing , and Air Resistance . 本节STEM课可以出现在科学学科中关于重力、减震和空气阻力的单元的最初或中间教学时。 Lesson objective is to engage students in activating prior knowledge or checking for understanding about gravity，shock absorbing and air resistance. 课程目标：回顾先备知识或检查学生对主要概念的理解。 Students are in groups of four to facilitate communication and collaboration. 学生将以4人小组形式进行合作与沟通。 Activity Details活动介绍 Subject: Science, Engineering and Math 涉及科目：科学，工程和数学 Grade Levels: 4-5 年级：4-5年级 Next Generation Science Standards: 3-5-ETS1-2 美国新一代科学标准： 3-5-ETS1-2 Engage: Mission to Mars活动内容：火星任务 Did you know…Within the next ten years, we may have people living on Mars. Would you go? 你知道吗？在未来十年内，有人可能会去火星生活，你愿意去火星吗？ Landing on a planet is tricky. Since a spacecraft can go as fast as 18,000 miles per hour (29,000 km per hour), it needs to be able to slow down as it approaches it’s target. Then it needs to land gently. If there are astronauts on board, the spacecraft needs to keep them safe. 宇宙飞船着陆是一件很艰巨的任务。试想，飞行器的运行速度高达18,000英里每小时（ 29,000千米每小时），飞行器接近目标时，速度需要放缓，着陆要缓慢，如果飞行器上有宇航员，还要考虑人的安全因素。 Key Concepts主要概念 Understand and use these key concepts when brainstorming the challenge with your team: 当你们小组针对这个具有挑战性的任务进行头脑风暴时，要理解和应用以下几个主要概念： Air Resistance 空气阻力 Force 力 Gravity 重力 Motion 运动 Shock-Absorbing 减震 Air Resistance空气阻力Air exerts a force on an object as it falls, slowing it down.当物体下落时，会遇到空气产生的力，下落速度减慢。 Gravity is pushing him towards Earth, while Air Resistance pushes upward against him, slowing his rate of fall. 重力作用使他向地面下落，这时空气阻力与重力成反方向，使下落速度变缓。 Force力A?force?is a push or pull upon an object resulting from the object‘s?interaction?with another object.?当一个物体接触另一个物体时，产生推或拉的力。 We create force when we push against each others hands. 当我们双手合十，互推时，即产生力。 Gravity 重力The force that attracts a body toward the center of the earth, or toward any other physical object.重力是吸引物体朝地心方向或朝