# ALEX Classroom Resource

## Water Density

Classroom Resource Information

Title:

Water Density

URL:

https://aptv.pbslearningmedia.org/resource/arct14.sci.zdensity/water-density/

Content Source:

PBS
Type: Learning Activity

Overview:

Students experiment with density by changing the density of water, in this activity from Zoom. Students will discover that the more salt there is in the water, the denser the water is. Density is one thing that makes things float.

Content Standard(s):
 Science SC2015 (2015) Grade: 5 3 ) Examine matter through observations and measurements to identify materials (e.g., powders, metals, minerals, liquids) based on their properties (e.g., color, hardness, reflectivity, electrical conductivity, thermal conductivity, response to magnetic forces, solubility, density). NAEP Framework NAEP Statement:: P4.1: Objects and substances have properties. Weight (mass) and volume are properties that can be measured using appropriate tools.* NAEP Statement:: P4.3: Matter exists in several different states; the most common states are solid, liquid, and gas. Each state of matter has unique properties. For instance, gases are easily compressed while solids and liquids are not. The shape of a solid is independent of its container; liquids and gases take the shape of their containers. Unpacked Content Scientific And Engineering Practices:Planning and Carrying out InvestigationsCrosscutting Concepts: Scale, Proportion, and QuantityDisciplinary Core Idea: Matter and Its InteractionsEvidence Of Student Attainment:Students: Make observations and measurements to identify materials based on their properties.Teacher Vocabulary:color hardness reflectivity electrical conductivity thermal conductivity response to magnetic forces solubility density measurement (quantitative and qualitative) data observable properties standard units conductors nonconductors magnetic nonmagneticKnowledge:Students know: Materials have different properties-color, hardness, reflectivity, electrical conductivity thermal conductivity, solubility, and density. Measurements of a variety of properties can be used to identify materials. Measurements should be made in standard units (e.g., grams & liters).Skills:Students are able to: Identify the phenomenon through observations about materials, including color, hardness, reflectivity, electrical conductivity, thermal conductivity, response to magnetic forces, and solubility. Identify the evidence and collect data about the observed objects in standard units (e.g., grams, liters). Collaboratively plan the investigation. Identify materials based on their properties.Understanding:Students understand that: Standard units are used to measure and describe physical quantities of materials such as weight, time, temperature, and volume. These measurements will assist in the identification of the materials ( e.g. powders, metals, minerals, and liquids).AMSTI Resources:AMSTI Module: Matter and Interactions Alabama Alternate Achievement Standards AAS Standard: SCI.AAS.5.3- Classify materials (e.g., powders, metals, minerals, liquids) based on their properties (e.g., color, hardness, reflectivity, electrical conductivity, thermal conductivity, response to magnetic forces, solubility, density). Science SC2015 (2015) Grade: 5 5 ) Construct explanations from observations to determine how the density of an object affects whether the object sinks or floats when placed in a liquid. NAEP Framework NAEP Statement:: P4.3: Matter exists in several different states; the most common states are solid, liquid, and gas. Each state of matter has unique properties. For instance, gases are easily compressed while solids and liquids are not. The shape of a solid is independent of its container; liquids and gases take the shape of their containers. Unpacked Content Scientific And Engineering Practices:Constructing Explanations and Designing SolutionsCrosscutting Concepts: Cause and EffectDisciplinary Core Idea: Matter and Its InteractionsEvidence Of Student Attainment:Students: Use data from observations to explain how the density of an object affects whether an object sinks or floats when placed in a liquid, like water.Teacher Vocabulary:density volume buoyancy data observe explain sink float massKnowledge:Students know: Objects are made of many tiny particles to small to be seen. Some objects have many tiny particles compacted close together that causes the object to sink while other objects the same size may float because their tiny particles are less compact. Some objects of the same size sink when others float. Buoyancy is the ability of an object to float.Skills:Students are able to: Predict the results of different types of objects being placed in water. Test the objects and communicate the results. Use appropriate tools (Scale, balance, ruler, or graduated cylinder) to measure the weight, mass, and/volume of an object. Construct an explanation to describe the observed relationship between density and the ability of an object to sink or float. Identify the evidence that supports the explanation that density affects the ability of an object to sink or float.Understanding:Students understand that: Cause and effect relationships are routinely identified and used to explain phenomenon like sinking and floating.AMSTI Resources:AMSTI Module: Matter and Interactions Alabama Alternate Achievement Standards AAS Standard: SCI.AAS.5.5- Observe how the density of an object affects whether the object sinks or floats when placed in a liquid; predict whether an object will float or sink in water.
Tags: density, float, salt, water
License Type: Custom Permission Type
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