What is made when an object blocks light?

Types of scientific inquiry that biologist engage in that cannot be completely controlled

When new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. this is because the rocks on the two sides of the ridge o are equal in width and in polarity are polar opposites oare magnetized vary in width but are equal in polarity

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?