Obsidian is a rock with glass-like characteristics. obsidian is formed by rapid what and why? (a) weathering(b) erosion(c) cementation(d) cooling

Ecosystems involve living organisms interacting with non-living things in a productive way; how is photosynthesis an example of this? answer, i will give brainiest to first person to get it right.

Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a.precipitation b.erosion c.migration d.condensation

What is the compliment dna strand to the following sequence: ttgactaggcta