Which one is a water pollution problem? A. Photosynthesis temperature
B. Natural pH
C. Eutrophication
D. Leaves changing color
E. Yogi Bear

Scientists often deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each of these numbers in an alternate form.