2. Discuss the differences in each level of magnification on the microscope (4x, 10x, 40x and 100x): e. g. which len(es) use(s) oil, which never touch oil, etc

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi, r^3 , where r is the sphere’s radius.

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis

Where is most of the fresh water on earth found a in the ocean b in glaciers and in ice caps c in rivers d in the soil