What advice would you give a person who handles hydrogen and oxygen in their workplace?

Embryos of different species look very similar, which shows that the organisms share a ancestor.

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand