Q: Fact: Earth 's surface is made of rock
Question: Using what the surface of the Earth is made of, you could build

A: a castle

Q: Fact: a simple machine requires mechanical energy to function
Question: A mechanical device requires 420 J of work to do 230 J of work in lifting a crate. What is the efficiency of the device?

A: 55%

Q: Fact: a tectonic plate moves along a fault line
Question: Tectonic plates are like a large

A: jenga

Q: Fact: a plant stem contains a system of tubes for transporting water and nutrients to other parts of the plant
Question: One way to see how a plant stem works could be

A:
putting the stems in food colouring