Silica (quartz) is a mineral whereas sandstone is a rock. Why?

Pixels are often referred to using dpi, or dots per inch. true\false

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

Ture or false evidence for evolution includes millions of fossils