1.Choose a scientific theory and describe the theory. You will describe the theory in 2-to-4 well-written paragraphs. Who developed the theory? How did the scientist come up with the theory? Has the theory changed over time? How has the theory impacted scientific thinking? Explain an experiment you could run to test the theory, including the design and execution, and any observations you can make of the world around you related to the scientific theory. How do these observations support or refute the theory?

Secondary pollutants are more harmful than primary pollutants. select the best answer from the choices provided ot of

What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.

When plants use sunlight to make food, the energy of sunlight is