Curated OER
Sink or Float?
Students will determine whether various objects sink or float in water. They do not need to explain why objects sink or float. They are rather to be encouraged to observe that the same objects will sink or float every time, i.e., that...
Curated OER
The Solar System: Why do we Explore?
Third graders act as scientists. In this property discovery instructional activity, 3rd graders explore the substance "Oobleck" (cornstarch, water, food coloring). They work in groups to investigate the substance and make observations as...
Curated OER
Mixing Oil and Water
Students explore physical science by participating in a class experiment. In this chemistry instructional activity, students discuss what they predict will happen when cooking oil and water are blended together. Students utilize a...
Curated OER
Determining Acids and Bases
Students use purple cabbage indicator to test five know substances for acidic/alkaline balance. They discuss the safety precautions required both inside and outside a lab in handling acids and bases.
Curated OER
Physical Difference and Classification
Students use a microscope and observation skills to compare and contrast several physical properties and develop a classification system.
American Chemical Society
Inquiry in Action: Comparing the Density of Different Liquids
How do the densities of vegetable oil, water, and corn syrup help them to form layers in a cup? Students will carefully pour vegetable oil, water, and corn syrup in any order into a cup and discover that regardless of the order they are...
American Chemical Society
Inquiry in Action: Changing the Density of a Liquid: Adding Salt
In this activity, students will see that a carrot slice sinks in fresh water and floats in saltwater. Considering the placement of the carrot slice in water and salt water, students will infer that the density of salt water must be...
American Chemical Society
Inquiry in Action: Changing the Density of a Liquid: Heating and Cooling
In this activity, students will investigate whether the temperature of water affects its density. Students will place colored hot and cold water in a cup of room-temperature water to see that cold water sinks while hot water floats. Then...
Science Education Resource Center at Carleton College
Serc: Layering Liquids
A lab activity to show students how different densities of liquid layer on top of each other by using four different colored liquids that contain different levels of salinity. This activity can also be used in an ocean unit where...
American Chemical Society
Middle School Chemistry: Density: Sink and Float for Liquids
Students determine whether a liquid will sink or float in water by comparing its density to the density of water.
Khan Academy
Khan Academy: Biology: Specific Heat, Heat of Vaporization, and Density of Water
Why does ice float? In this article answer that question by learning about the topics of Specific heat capacity, evaporative cooling, and heat of vaporization of water.
Science Education Resource Center at Carleton College
Serc: Exploring the Properties of Liquids, With an Emphasis on Density
Learners experiment with liquids; comparing and contrasting, and creating a density tower leading to a beginning understanding of density.
Simon Fraser University
Chem1 Virtual Textbook: Densities of Substances and Materials
As part of a larger site called "Getting started in Chemistry," this site examines various topics related to the densities of substances and materials. Included in the study are properties of solids, liquids and gases, and how density is...
TeachEngineering
Teach Engineering: Density Column Lab Part 2
Concluding a two-part lab activity, students use triple balance beams and graduated cylinders to take measurements and calculate densities of several household liquids and compare them to the densities of irregularly shaped objects (as...
Chemistry Collective
Chem Collective: Identifying an Unknown Liquid From Its Density
In this activity, students use the virtual lab to design an experiment to determine the identity of mislabeled bottles using the densities of the solutions inside.
American Chemical Society
Middle School Chemistry: Density of Water
Discover how the molecular make-up of water affects its density.
Exploratorium
Exploratorium: Science Snacks: Klutz Proof Density Column
An activity to help you create a density column that contains layers of liquids that are separated by different densities.
Woods Hole Oceanographic Institution
Woods Hole Oceanography Institute: Activity: Demo for Density
In this experiment, students look at Deep Hypersaline Anoxic Basins, or DHABs, that are present in the Eastern Mediterranean, and make a model of a DHAB to investigate how liquids that have different densities can form layers. This...
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Comparing Densities of Different Liquids
This lab experiment has students observe and compare the density of five different liquids while measuring mass and volume.
Science is Fun
Science Fun: Layered Liquids
This experiment allows you to dramatically demonstrate the different densities of five different common household liquids.
Energy4Me
Energy4me: Understanding Density
This activity explores the property of density in a variety of liquids and solids.
Michigan Reach Out
Reach Out Michigan: Are All Liquids the Same
This experiment demonstrates the density of selected liquids.
Science is Fun
Science Is Fun: Layered Liquids
An investigation into what properties liquids have that enable them to sit in separate layers in a container.
TeachEngineering
Teach Engineering: Density & Miscibility
After young scholars conduct the two associated activities, Density Column Lab - Parts 1 and 2, present this lesson to provide them with an understanding of why the density column's oil, water and syrup layers do not mix and how the...
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