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.
Most Common Mineral of the Continents. The most common mineral of the Earth's continents - the world we spend our time in - is quartz, the mineral SiO2. Nearly all the sand in sandstone, in the deserts of the world and on its riverbeds and beaches is quartz. Quartz is also the most common mineral in granite and gneiss, which make up the majority of the deep continental crust.