Which of these cause the build up of volcanic landforms?

A. ash
B. ash and cinder
C. ash and lava
D. ash, cinder, and lava

The modern periodic table has groups.

How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 fe (s) + 3 o₂ (g) → 2 fe₂o₃ (s)

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?