Science: How do you tell which rock type you have. In your hands?

This guy does an excellent job using actual rock specimens to give you a simple way to identify the three types of rock. Metamorphic, sedimentary and igneous. Even though there are always exceptions to rules in science, you will find out some characteristics of each rock type that will give you an idea of what type of rock you are looking at.

Grade level: 6-12
Subject: Geology
Length:  3:09

Science: What are the types of lava flows?

This educational science video shows some of the different types of lava flows. There really aren't any word in the video, but it has some excellent quality photography. If you are discussing lava in the classroom, then this video would be an excellent introduction.

Subject: geology
Grade level: K-12
Length: