Fe + O2 → Fe2O3 Which is a reactant in the equation above?
O Fe
O Fe, O2, and Fe2O3
O2 and Fe2O3
O Fe2O3

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.

oak trees? ? what was listed

the scientific method.

sex cells are usually half's then they find another half and make a fertilize egg