How might changed in the cycling of matter and flow of energy in the Earth system affect the intensity and duration of a drought?

What are the similarities of physical and chemical change ?

Which of these natural resources is non-renewable a.corn b.wind c.geothermal d.natural gas

Asolution of naoh has a concentration of 25.00% by mass. what mass of naoh is present in 0.250 g of this solution? use the periodic table in the toolbar if needed. 0.0625 g what mass of naoh must be added to the solution to increase the concentration to 30.00% by mass? g