Diving Cartesian Octopus
The Diving Octopus is a twist on the Cartesian Diver science classic. The octopus floats in a bottle filled with water, then when the bottle is squeezed the octopus mysteriously takes a plunge to the bottom. Release the squeeze and up the octopus ascends to the top again. This kit also includes a fun activity where the aim is to hook a sunken weight and bring it to the surface.
What You Get
A plastic bulb (Diving Octopus) with nuts and wire attached, 3 weights. Instructions. You need to supply a 2 liter plastic bottle as the diving tank.
How does it work
Buoyancy is the tendency of an object to float in a fluid. An object floats if it's lighter (or less dense) than the fluid, and will sink if it is more dense. The density of the Diving Octopus is made up of the plastic pipette bulb, nut, air pocket and water inside the bulb. When the bottle is squeezed, compressing the air inside the dropper and allowing more water to enter the bottle causing it to sink. When the bottle is released, the pressure drops again. The air in the dropper expands, pushing water out. This makes the diving Octopus lighter, so it floats to the surface.
- Floating, sinking and buoyancy
- Relationship between air pressure and density
- Difference in the properties of air and water
WARNING: CHOKING HAZARD Small Parts. Not for children under 3 years.
|Age Group||5-6 Years, 7-8 Years, 9-10 Years|
What are the shipping costs?
FREE Shipping is available on all orders over $120 to anywhere in Australia!
Orders under the value of $120 incur a low flat rate shipping cost of only $9.95 to anywhere in Australia.
Express, Registered and International delivery options are also available. The cost for these premium shipping services will be automatically calculated during the checkout process. Please conact us if you have any queries with these services.
In some cases we may need to apply a shipping surcharge to large or fragile items, especially to remote or non-urban locations. You will be contacted by us for confirmation if this additional charge is applicable.
How long will it take for my order to arrive?.
You should receive your order within 2 to 4 working days, although to some regional and out back areas it can take up to 2 working days longer. Orders going to WA also take a little longer, up to 6 working days.
All standard orders are shipped using Australia Post's eParcel service, so you'll be kept fully informed of the progress of your order during its journey to you. Aside from receiving regular email updates, you can enter your tracking number into Australia Post's website at any time for information about the delivery status of your order.
International delivery will take from between 1 to 4 weeks depending on the destination and potential customs clearance delays.
When will my order be shipped?
We ship every Victorian business day. Orders received and paid for by 12pm AEST time will generally be shipped the same day.
If you require your order urgently, we have a next day delivery express service available.
What locations do you ship to?
We ship to both Australian and International customers.
What shipping options are available?
The majority of orders are shipped using Australia Post's trackable eParcel service, with larger orders being sent by national courier.
We also have options for express or registered post. A number of international delivery options are also available. These can be selected during checkout.