Blog

The pictures below show the wavelengths and intensities of electromagnetic radiations emitted by three stars, Star 1, Star 2, and Star 3. Which of these statements is correct about the color of the three stars? (3 points)

Which of these pictures best shows a watershed model? (3 points)

Which of the following best describes the transfer of phosphates and the impact on the environment and human health? (3 points)

Two stars, Star 1 and Star 2, are at almost equal distances from Earth. The table below shows the masses of the two stars. Name of Star Mass of Star (in million solar masses) Star 1 3.61 Star 2 11.73 Which of these statements is most likely correct about the stars? (3 points)

The graph below shows the salmon population, in thousands of pounds, in the Columbia River, from 1866 to 1983. Based on the graph, which of these conclusions is most likely correct? (3 points)

Which of these best matches surface features with the processes that are responsible for their formation? (3 points)

Which of these pollutants is transferred from soil to water by fertilizer runoff from farms and leaky septic tanks? (3 points)

The lake water in a location in Florida had an unusual color and smell. Investigations revealed that the lake water contained high levels of toxic fertilizers and pesticides which were carried into the lake from gardens and common areas in the location. How can people prevent toxic run-off into the local lake? (3 points)

Which of these properties of a star best determines whether it would end up as a white dwarf, neutron star, or black hole? (3 points)

Which of these properties of a star best determines its life cycle? (3 points)