BBC4 个月
Van Helmont's experiments on plant growth
give the plants different quantities of fertiliser in their soil to test its effect on growth. Use to develop the idea of controlling variables in experiments. The clip raises issues about the use ...
BBC1 年
Van Helmont's experiments on plant growth
give the plants different quantities of fertiliser in their soil to test its effect on growth. Use to develop the idea of controlling variables in experiments. The clip raises issues about the use ...