Anay Patel - Gizmos Density Lab

pdf

School

San Jose State University *

*We aren’t endorsed by this school

Course

Subject

Chemistry

Date

Feb 20, 2024

Type

pdf

Pages

Uploaded by UltraCamel1557

Name: Anay Patel Date: 11/18/20 Student Exploration: Density Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary : density, mass, matter, volume Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. List three objects that you think would sink in water, and three objects you think would float. Sink: Rock, scissors, and stapler Float: Balloon, rubber duck, and a basketball 2. Why do you think some things float and some things sink? Some items are more or less dense than water. Gizmo Warm-up 1. In the Gizmo, drag the apple onto the Scale . The scale measures mass . Mass is the amount of matter , or “stuff,” in an object. What is the apple’s mass? (Note: “g” stands for grams.) 33 grams 2. An object’s volume is the amount of space it takes up. The volume of an object can be measured by using a graduated cylinder . Observe the graduated cylinder and the blue text showing the volume of water inside the cylinder. A. What is the starting volume of water in the graduated cylinder? 400 ml B. Place the apple into the cylinder. What is the volume in the cylinder now? 440 ml The water rises in the cylinder because it is displaced, or pushed upward, by the apple. The amount of displaced water is equal to the volume of the apple. C. What is the volume of the apple? (Use the Object volume to check.) 40 cm cubed Note: Milliliters (mL) are used for liquid volumes, while cubic centimeters (cm 3 ) are used for solids. One mL is the same volume as one cm 3 . The apple’s volume is measured in cm 3 . Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved

Activity A: Sink or float? Get the Gizmo ready: ● Replace all objects on the shelf. ● Be sure the liquid in the beaker is Water . Question: How do mass and volume affect sinking and floating? 1. Predict: Which objects do you think will float in water? Which do you think will sink? Record your predictions below in the first column of the table. Object Prediction (sink or float?) Mass (g) Volume (cm 3 ) Result (sink or float?) Ping pong ball float 3 grams 36 cm cubed float Golf ball sink 45 grams 36 cm cubed sink Apple float 33 grams 44 cm cubed float Chess piece sink 40 grams 80 cm cubed float Penny sink 3 grams 0.4 cm cubed sink Rock sink 200 grams 50 cm cubed sink 2. Experiment: Use the Gizmo to find the mass and volume of each object and whether it floats or sinks. Record your results in the table. 3. Analyze results: Look at the data in your table. A. Can you use mass alone to predict whether an object will sink or float? Explain. No because if you look at the penny it was 3 grams compared to the 40 gram chess piece and it still sank. B. Can you use volume alone to predict whether an object will sink or float? Explain. No because the ping pong ball and the golf ball were the same volume and the ping pong ball floated and the golf ball sank. 4. Draw conclusion: Can you use mass and volume to predict whether an object will sink or float in water? Explain your thinking. No because sometimes items that float and items that sink can have the same volume and mass but end up having completely different results. 5. Apply: Measure the mass and volume of the toy soldier. Mass: 120 grams Volume: 80 cm cubed Will it float or sink? sink Use the Gizmo to test your prediction. Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved

Activity B: Calculating density Get the Gizmo ready: ● Replace the objects on the shelves. ● Be sure the liquid in the beaker is Water . Question: How does density tell you whether an object will sink or float? 1. Calculate: Density is the amount of mass contained in a given volume. To find the density of an object, divide its mass by its volume. Density is recorded in units of grams per cubic centimeter (g/cm 3 ). What is the density of an object with a mass of 100 g and a volume of 50 cm 3 ? 2 g/cm cubed 2. Record data: In the Gizmo, find mass and volume of the objects listed below. Then calculate each object’s density and record it. Finally, test whether each one sinks or floats in water. Object Density (g/cm 3 ) Sink or Float? Chess piece 0.5 g/cm cubed float Rock 4 g/cm cubed sink Toy soldier 1.5 g/cm cubed sink Apple 0.75 g/cm cubed float 3. Draw conclusion: The density of water is 1.0 g/mL, or 1.0 g/cm 3 . Look at the data in your table. How can you use the density of an object to predict whether it will sink or float? If the object is less than 1.0 g/cm cubed which is the density of water it will float and if it is more it will sink. 4. Apply: In the Gizmo, either Crown 1 or Crown 2 is solid gold (but not both). Find the density of the gold nugget and of each crown. (Hint: You will probably need a calculator to do this.) A. Density of the gold nugget: 18.3 g/cm cubed B. Density of Crown 1: 8.4 g/cm cubed C. Density of Crown 2: 19.3 g/cm cubed Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

D. Which crown is pure gold? Crown 2 Activity C: Egg-speriment Get the Gizmo ready: ● Replace all the objects on the shelf. Question: How does an object behave in different liquids? 1. Observe: Use the Gizmo to explore whether the egg sinks or floats in different liquids. Record what you find in the table below. Liquid Water Oil Gasoline Seawater Corn Syrup Sink or Float? sink sink sink float float 2. Draw conclusion: Which liquids are denser than the egg? Which are less dense? Explain your reasoning. Water, oil, and gasoline are less dense than the egg but seawater, and corn syrup are more dense. I know this because more dense items will sink, that's why seawater and corn syrup sank compared to the egg. 3. Extend your thinking: Observe the egg in each liquid again. A. In which liquid does the egg float the highest? corn syrup B. In which liquid does the egg sink the fastest? gasoline C. Which liquid do you think is the densest? Least dense? Explain. I think corn syrup is the most dense because of how fast the egg gets to the top and gasoline is the least dense because of how fast the egg reaches the floor of the container. The gasoline pretty much made a pathway for the egg to fall while the corn syrup pushed the egg up as fast as it could. 4. Challenge yourself: Using the objects in the Gizmo to help you, list the liquids from densest to least dense. Discuss your answer with your teacher and classmates. (Hint: Compare where objects float within each liquid.) Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved

Most dense : Corn syrup, seawater, water, oil, and gasoline : Least dense. Corn syrup pushes the egg up meaning it is more compacted than the egg, same with the seawater. The normal water is the third most dense because it brings the egg down slowly meaning it is still compact just not as much as the corn syrup or the seawater because the normal water still lets the egg get through. The oil lets the egg go down a little faster than the normal water but the gasoline just doesn't even try compared to the other ones it kind of just makes a gap to let the egg go down. Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved