Navigation: Ideas for Investigation We’ve been trying to figure out where food molecules come from in plants. We think plants must be making them from parts that they take in. One tool we can use is a simulation to figure out how all the parts of the system are interacting.

If we could represent what is going on inside a plant using a simulation:

What inputs and outputs of the plant system would we want to represent?

What structures of the plant would we want to represent?

The lights used by mark watley (played by matt damon) during the film the martian seem to be metal halide lamps. metal halide lamps are filled with vaporized mercury and metal-halogen compounds. when an electric current is passed through the lamp, the tube begins to glow a bright white/blue color. if you were to pass this light through a prism to separate the individual light frequencies, you would see a rainbow just as you would if using natural sunlight because of the complexity of the metal halide gas and the vast amount of possible electron transitions. (the study of light in this way is known as spectroscopy and allows astronomers to know exactly what atoms compose distant stars, simply by looking at the light they emit. the spectral lines an atom produces uniquely identifies that atom just like a fingerprint uniquely identifies a person. the momentum equation and energy equation that we have used above can be combined to give the following equation: c = e p where again p is the phonon momentum, e is the photon energy and c is the speed of light. when you divide the photon energy found in #6 by the photon momentum found in #4, do you get the speed of light? (if not, check your work for questions #4 through #6). yes no

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

Which best represents the law of conservation of mass ?