In Math this week we learned about volume. We thought about how objects take up space. A line takes up space in two dimensions. An object that we can hold takes up space in three dimensions. To understand those three dimensions, we estimated the volume of objects by making a model of the object using cubic centimeter blocks. After we made several estimations, we actually measured each object's volume by calculating its water displacement. We did this by placing the object into a graduated cylinder with an exact amount of water already in the graduated cylinder. We learned about reading the level of the water by looking at the bottom of the meniscus and being certain to read the meniscus at eye level. We subtracted the first amount of water in the graduated cylinder from the measurement of the water with the object in the graduated cylinder. This gave us the volume of the object.
We also did a math lab looking the the volume of a container. We used four different containers and did three trials to help figure in our human error in reading the graduated cylinders and pouring the water. Then we calculated the average of the three trials. This gave us the volume of each container.
Next week we will continue looking at the volume of containers by exploring the standard form of liquid measurement: gallon, half gallon, quart, pint, cup, tablespoon, and teaspoon.
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