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Exploring Density Measuring Mass and Volume of Obj

Explore how objects float or sink by measuring mass and volume to find density. Floating objects often have lower density regardless of shape; sinking ones are denser and heavier.

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    Gizmos Name: Date: Student Exploration: Density Laboratory Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: buoyancy, density, graduated cylinder, mass, matter, scale, volume Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. Of the objects below, circle i » the ones you think would float in water. Click on the image and select EDIT to use the drawing tool. 2. Why do some objects float, while others sink? I think some sink because they have to much density Gizmo Warm-up The Density Laboratory Gizmo allows you to measure a variety of objects, then drop them in water (or other liquid) to see if they sink or float. 1. A n objects mass is the amount of matter it contains. Mass can be measured with a calibrated scale like the one shown in the Gizmo. Drag the first object onto the Scale. (This is object 1 .) What is the mass of object 1? 19.&g 2. A n objects volume is the amount of space it takes up. The volume of an irregular object can be measured by how much water it displaces in a graduated cylinder A. What is the initial volume of water in the cylinder? 400ml B. Place object 1 into the cylinder. What is the volume in the cylinder now? 414.2 ml I C. What is the volume of the object? 14.2 Reproduction h x enucabonal use only. PiJilic sharing o r posting prahiiited. C ' 2 D 2 0 ErplareLenrning™ All rights reserved

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    Note: While milliliters (mL) are used to measure liquid volumes, the equivalent unit cubic centimeters (cm 3 ) are used for solids. Therefore, write the volume of object 1 in cm 3 Get the Gizmo ready • Drag object 1 back to the shelf. • Check that Liquid density is set to 1.0 g/mL. Activity A: Float or sink? Question: How can you predict whether an object will float or sink? 1. Observe: Experiment with the different objects in the Gizmo. Observe the mass and volume of each object, then drag it into the Beaker of liquid to see if it floats or sinks. (Notice a pin holds objects in the graduated cylinder, whether they sink or float.} Try to determine what the floating objects have in common and what the sinking objects have in common. 2. Form hypothesis: Compare the floating objects, then do the same for the sinking objects. the most of the floating objects are triangles and round objects heavy objects don't sink what they have in common is that the mass of the object is a high mass A. What do the floating objects have in common? B. What do the sinking objects have in common? 3. Collect data: Measure the mass and volume of objects 1 through 12, and record whether they float or sink in the table below. Leave the last column blank fbr now. Object Mass {g) Volume (cm 3 ) Float or sink? 1 19.5 14.2 sink 2 1 1 . 1 9.7 sink 3 4.3 5.6 float 4 134.3 7.8 sink 5 3.9 3.5 sink 6 78.7 29.2 sink 7 2.3 20.8 float 8 24.4 25.7 float 9 99.6 43.9 sink 1 0 4 2 . 1 60.3 float sink 1 1 65.5 41.2 sink 12 104.3 114.1 float Reproduction lor en ucabonnl use only. Public sharing a r posting pnahtribed. C' 2020 BcpIareLeernirig'™ All rights reserved

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