Which rock would be best for a skate ramp?

 

Can you describe the features of a good skate ramp and begin to suggest which rocks would be suitable or not suitable as a building material?

       

• What are the features of a good skate ramp?
• Can you name any rocks that have these physical properties?
• What other everyday materials could be used for a skate ramp, instead of rock?
• What material do you think most skate ramps are made from and why?
•  Explain which rock you think will be most suitable for a skate ramp and your reasons why