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.
Oxygen is the most common element on earth. This is followed by  silicon, aluminum, iron, magnesium, calcium, sodium, and potassium.  These elements make up 99 oercent of thâ¦e earth's mass. All other  elements combined make up less than 1 percent of the remaining  mass.