Teacher PackBoat Design & Heritage (KS 2)

1. Floating and sinkingDivide the items into two piles:1) objects you think will float2) objects you think will sink

Which items are made of: metal, wood, rock?

2. Testing your ideasTake the clay and make it into a ball. Check

whether it now floats or sinks.

Mould it into the shape of a boat, does it now float or sink?

3. Testing your ideasTake it in turns to place all the items in the water.

Did any items not behave as you predicted?

Does the clay sink or float?

4. Making predictionsSolid polystyrene would normally sink in water.

Why does polystyrene foam float?

What do you think will happen to the sponge over time if you leave it in the water?

5. Making predictions continued..Can you predict if any of the following will float: a rock, a stick, A bicycle

6. Why do steel boats float?• The famous ship the Titanic was made of steel (like the teaspoon).

• Why did it float (before it hit the iceberg)?

• Why did the Titanic sink (after it hit the iceberg).

7. Building model sailing boats Look at the tools and materials you have been given.

Can you identify possible hazards?Suggest ways in which to reduce the risks.

8. Drawing your boat baseUse a felt tip and ruler to draw

this shape on your pizza base.

Use the whole length of the

pizza base, and make the boat

quite wide.

If your boat is too narrow

what is likely to happen?

9. Cutting out your boat baseGet some scissors to cut out the boat shape.

Cut a cube out of the foam packaging material. It should be about 30 mm across.

10. Assembling your boatStick your foam cube firmly onto your boat base

like this using a cocktail stick.

You will be using a wooden skewer as the mast to support the sail. One end of the skewer is pointed. Which way up do you think the skewer should go and why?

11. Making the mast and sailPress the pointed end of your skewer down firmly into the foam cube to make the mast.

Cut your sheet of paper so that it is shorter than the mast and trim it to your preferred shape. Punch a hole in the middle of the top and bottom Decorate your sail with the felt tip pens.

12. Testing your boat• Slide the sail onto the skewer, place

the boat in the water tray and blow into the sail to try out your sailing boat.

• You can customise your boat by adding a flag, a sailor, fins, a keel or rudder or even turn it into a catamaran using spare foam packaging.

• Try out your boat after any modifications to make sure it still works properly.

• Clear up thoroughly.

13. Questions

What force is pulling the boat down onto the water?

What opposing force is pushing the boat up?

Is the force pushing the boat up bigger, smaller or the same as the force pulling it down?

If the force pulling the boat down was bigger than the force pushing it up then what would happen?

14. Extension QuestionsCan you explain why the boat moves across

the water when you blow into the sail?

What do you think is the main force opposing the boat moving?

Can you suggest ways in which you could make a faster boat?