Propiedades de los materiales – Clip

Surfers stay on water by using surfboards, which are made of porous plastic foam coated with waterproof material. These boards are lightweight and have a density less than salt water, allowing them to float and support surfers on the surface or while riding waves.

What is the primary reason surfers can stay on water?

• They have special shoes.

• They use a surfboard.

• They swim very fast.

• They wear life jackets.

What is a common material used in the core of surfboards?

• Wood

• Metal

• Porous plastic foam

• Glass

What is applied to the surface of surfboards to make them waterproof?

• Oil

• Waterproof material

• Rubber

• Paint

Why do surfboards float on water?

• They are very large.

• They have a density less than salt water.

• They are made of metal.

• They are filled with air.

What allows surfers to ride big waves?

• The size of the surfboard

• The lightweight nature of the board

• The density of the board

• The waterproof coating