Use a spring scale to measure the weights of several objects accurately. Explain that the weight of an object is a measure of the force of gravity on the object. Record the measurements in a table.
Force and Motion
In prior grades students learned that forces work not only to push and pull objects, but also to affect objects when they are dropped or thrown. In grades 4-5 students learn how to use basic tools to measure the fundamental quantities of force, time, and distance. Force can be measured with a spring scale. Distance and time can be measured by a variety of methods, and the results can be used to compare the motion of two objects. Focusing on accuracy of measurement, recording of data and logical conclusions from the data provide the foundation for future years when students will undertake more complex investigations.
The weight of an object is a measure of how strongly it is pulled down toward the ground by gravity. A spring scale can measure the pulling force.