How do boats float?

How do boats float?

Boats come in all shapes and size, from small canes to giant supertankers. A boat pushes away a certain amount of the water bebeath it. The water pushes back aganist the boat with an upward force, called buoyancy, which is equal to the weight of the displaced water. This upwards force keeps the boat floating.

What is a skyscraper?

skyscraper

The term "skyscraper" was first used in the 1880's to describe a building with more than ten storeys. Today a building isn't considered to be a skyscraper unless it has at least 40 storeys. Humans have constructed buildings for shelter for thousands of years and they come in all shapes and sizes.