Skip to content
Skip to main content

About this free course

Download this course

Share this free course

An introduction to geology
An introduction to geology

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

1.2 Watch out for concrete

Having learned about the three different types of rocks, complete the activity below.

Activity _unit1.3.1 Activity 1.1 Concrete

Timing: Allow about 2 minutes

Concrete is a building material that has been used since pre-Roman times. It is a mixture of sand and gravel held in a matrix of cement. Sound familiar? It should do, but which type of naturally occurring rock does concrete resemble?


sedimentary rock


metamorphic rock


igneous rock

The correct answer is a.


Some concrete really can look like a rock, so be careful when you go out and find your own rocks to identify later in the course.