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Hands on: How do you measure mass and density? Does greater mass imply greater density? What quantity determines floating or sinking? Is it true to say that light objects float and heavy objects sink?
动手实践：如何测量质量和密度？更大的质量是否意味着更大的密度？什么量决定了物体漂浮还是下沉？说轻的物体漂浮而重的物体下沉是否正确？
What quantities must you measure to describe completely
the motion of a ball tossed into the air?
What units are used to specify these quantities?
What are the three most commonly used systems
of units?
What are the three fundamental mechanical
quantities which form the basis for all mechanical
measurement?
What are the prefixes used with powers of ten to denote 1000x and 1/1000?
Georgia QCC, Grade 6 Standards
佐治亚州第六年级标准
要完全描述一个被抛向空中的球的运动，必须测量哪些量？这些量用什么单位来指定？最常用的三个单位制是什么？哪些是构成所有机械测量基础的三个基本机械量？用于表示1000倍和1/1000的十次幂前缀是什么？ |
*Density
*Buoyancy
*Archimedes principle
*Buoyancy concepts
*Volume and density from Archimedes principle
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*Measuring motion
*Motion units
*Systems
of units
*Mechanical
quantities
*Powers of ten
* 密度 * 浮力 * 阿基米德原理 * 浮力概念 * 从阿基米德原理推导体积和密度 *** * 测量运动 * 运动单位 * 单位制 * 机械量 * 十的幂 |