Vcnrgjgfdjgfdjfh
From Algodoo
Float and sink
| Language: | English |
|---|---|
| Description: | The students will create objects of different shapes and materials and investigate whether they sink and float. Investigate properties of different shapes of the same material. How can steel float? Besides assigning material properties to objects, the students can also be introduced to density and investigate how numerical values of density relates to density of water. What is the density of water, when does an object neither float or sink? |
| Target: | Key Stage 2 |
| Category: | Exercise |
| Discipline: | Fluids and gases |
| Learning objectives: |
Predict and observe the buoyancy of objects of different materials. Investigate how the density of an object affects its buoyancy. |
| In class: | Discuss what objects sink and what objects float. Discuss what make objects float.
Why does a boat made of steel float? How does an iceberg float? Put up suggestions on the board. Discuss how this can be visualized and explored in Algodoo. Let the students create scenes in Algodoo using the suggestions you came up with together or let them use their own ideas. Help the students make decisions and ask guiding questions. Encourage the students to follow the procedure Create – Predict – Interact – Evaluate. Allow the students to follow-up and share their experiences in class after the simulation. |
Steps in Algodoo
Create a scene
Create a container, about 2 m wide by using for example the brush tool. Drawing a large body inside the container and select Liquify under Geometry actions. Run the simulation to fill the container. Create an object and clone it to make a number of objects of equal size. Assign different material to the objects.
Make a prediction
Which objects will float and which will sink?
Run/Interact
Run the simulation and watch objects float and sink.
Evaluate
What properties are different between the objects? Why do some float and why do some sink? What happens with the water when the objects are put in?
Revise scene
Create an iceberg. Remove items from the container if it gets too crowded.
Make a prediction
How do you expect the iceberg to float? What happens when the iceberg melts or pieces fall off?
What happens if you turn the iceberg into water?
Run/Interact
Run the simulation. Use the knife and cut pieces of the iceberg to change its shape. You may have to remove the pieces.
Evaluate
How does the iceberg float?
What happens when its shape is changed?
How does the water level change when the iceberg melts?
