Click the box next to the Save copy as field so it's selected, and then click the PowerPoint Presentation file from the drop-down list. Select the folder on your computer where you want to save the Keynote file as a PowerPoint file. Click the Save button. Close the Keynote application and open PowerPoint.
This question is archived. That would be igneous rock. Igneous rock is formed by the cooling of molten rock (magma and/or lava). Since there is such and abundance of liquid rock on Earth, it makes igneous rock the most common TYPE of rock.
Mica Minerals. Feldspar is the most common mineral in the Earth s crust, so you are very likely to find it in the rocks you collect! It is found it all of the three rock types, but is most common in intrusive igneous ...more.hat means the rocks in your backyard probably have common minerals in them that you can identify. Minerals are divided into different groups based on their chemistry. The most common mineral group on Earth is the silicate minerals, which all have the elements silica and oxygen as their main ingredients.