Does this action make a physical or chemical change: hydrogen burns in chlorine gas

Much of the general structure and physical properties of the interior of the earth are inferred from: a)deep oil and gas bore holes b)geologic investigations c)analysis of seismic waves d) study of volcanoes

What approach is required to balance the objectives of sustainable development? balancing the objectives of sustainable development requires a(n) .

What are four significant sources of ghgs that come from wostem washington?