Why does obsidian and igneous rock appear smooth and glassy

Are characterized by dry conditions, limited vegetation and wide temperature range. a.) tropical rain forests b.) deserts c.) grasslands d.) none of the above

For their summer holiday, jane and her family are visiting places surrounding the mediterranean sea. which type of biome is jane and her family visiting? a. rainforest b. shrubland c. tundra d. coniferous forest

In the practice of science, this type of reasoning is used to develop explanations.