the rock cycle
This is the process by which rocks are broken down by wind, water, or ice.
What is weathering?
This type of rock forms from cooled lava or magma.
What is igneous rock?
This is the top layer of soil where plants grow.
What is topsoil?
This is a naturally occurring, solid substance with a definite chemical composition and crystal structure.
What is a mineral?
This common building material is made from limestone.
What is cement?