Density: Testing Objects

• Science
• 5th Grade

Density: Testing Objects

Learning Objective

At the end of the lesson, you will be able to classify and determine if objects are more or less dense than water.

Introduce the learning objective to the students, explaining what they will achieve by the end of the lesson.

What do you already know about density?

Slide 1: Introduction

Density is an important property of matter. Density compares the mass of an object to its volume.

In the next two slides, make an educated guess on which objects are more dense or less dense than water.

More dense- sinks

Less dense- floats

Start by introducing the concepts of solubility and density, providing a brief explanation of their importance.

What objects are less dense than water?

What objects are more dense than water?

Slide 3: Density

Density compares the mass of an object to its volume. Objects that are more dense than water will sink, while objects that are less dense will float.

Introduce the concept of density and explain how it is measured. Discuss the relationship between density and sinking/floating in water.

Slide 5: Testing for Density

To test for density, fill a container with water and carefully place the object in it. Observe if it sinks or floats.  Record your observations on the next slide.

Demonstrate how to test for density using water as the liquid. Remind students to handle the objects and water with care.

Items	Density
Cork stopper- cork
Lego-plastic
Nail- iron
Donut Ring- Rubber
Dish Sponge- sponge
Packaging- styrofoam
Stick- wood
Sugar Cube- sugar
Penny- cooper
Cotton ball- cotton

As you test each object, drag and drop the correct answer into the data chart.

Less dense

More dense

Less dense

Less dense

Less dense

Less dense

Less dense

Less dense

Less dense

Less dense

Less dense

More dense

More dense

More dense

More dense

More dense

More dense

More dense

More dense

More dense

Items	Density
Cooking Oil
Syrup
Honey
Sand

As you test each object, drag and drop the correct answer into the data chart.

Less dense

More dense

Less dense

Less dense

Less dense

Less dense

Less dense

Less dense

Less dense

Less dense

Less dense

More dense

More dense

More dense

More dense

More dense

More dense

More dense

More dense

More dense

Slide 6: Conclusion

By testing the density of objects, we can better understand their properties and how they interact with other substances.

Summarize the key points of the lesson and emphasize the importance of testing solubility and density to gain a deeper understanding of objects.

What happens to objects that are less dense than water?

1. they melt
2. they sink
3. they explode
4. they float

What happens to objects that are more dense than water?

1. they evaporate
2. they disappear
3. they sink
4. they float

What is the relationship between density and sinking or floating?

1. Objects with higher density will sink, while objects with lower density will float
2. Density has no effect on sinking or floating
3. Objects with higher density will float, while objects with lower density will sink
4. Objects with higher density will evaporate, while objects with lower density will dissolve

Write down 3 things you learned in this lesson.

Have students enter three things they learned in this lesson. With this they can indicate their own learning efficiency of this lesson.

Write down 2 things you learned in this lesson that can help your design team with The Cooler Project.

Have students enter three things they learned in this lesson. With this they can indicate their own learning efficiency of this lesson.

Ask 1 question about something you haven't quite understood yet.

The students indicate here (in question form) with which part of the material they still have difficulty. For the teacher, this not only provides insight into the extent to which the students understand/master the material, but also a good starting point for the next lesson.