anyone good with identifying rocks? I'm trying to sort out all my rocks and gemstones and I can't seem to figure this one out. it might be man-made, but I just really want to get an ID for this one.

What are the main functions of the human skeleton? a exchange of gases b support and movement c sensing the environment d digestion and excretion

Which of the following practices is not recommended during a time of water scarcity? a. increasing wastewater recycling b. prohibiting the consumption of bottled water c. raising fines for violating outdoor water restrictions d. improving monitoring and management of local aquifers e. utilizing media to promote awareness of best practices in water management

Why is wilhem wundt considered the "father of psychology"?