Science | Floating and Sinking

Today for tech we have been learning about what floats and what sinks. When an object is floating it is called buoyancy and that it is when air is inside the object. When an object sinks it means it has no air and the weight of it is too heavy. When it semi-floats it means it is heavy but has some air inside. 

Our experiment was to find out which objects will float or sink. One type of a vehicle that floats is a cruise ship. The reason why it floats is because the cruise ship is hollow in the inside which makes it float. 

One type of vehicle that sinks is a car. This is because of the weight and there's not much air inside the car. 

One type of a vehicle that semi-floats is a submarine. This vehicle also floats because when the tanks are empty the submarine has less weight, and that's why it floats normally like boats. The reason why it sinks is because the water is allowed in the tanks and increases the weight of the vehicle. 

Then we did an activity on whether the object will float, sink, or semi-float. The objects we used to experiment on we're sport balls, different types of bricks, plastic, etc. 

Lastly we wrote down the results for each object given to see if our predictions were correct. 

I found this session interesting because we learnt why certain object float, sink, or semi-float.