A marine biologist measured the amount of heat radiated from an aquarium over the course of an experiment. He concludes that the aquari
system Explain why this conclusion is invalid.
An open system does not exchange energy with its surroundings, and the scientist only measured the exchange of heat.
An open system does not exchange matter with its surroundings, and the scientist did not measure the movement of matter
An open system exchanges both energy and matter with its surroundings, and the scientist did not measure the movement of matter
An open system exchanges matter but not energy with its surroundings, and the scientist did not measure the movement of matter

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.

propane is burned to provide the heat in many cooking grills. the chemical reaction for this process is shown in the equation below.

c3h8 + 5o2 ? 3 co2 + 4h2o + energy

what are the products in this chemical reaction?

3co2 + 4h2o + energy

reflection is the bouncing back of a propagating wave when it encounters a barrier; usually shows an image of the source of light wave

1) bounces back from an opaque material

2) bounces back from the boundary

3) seen in mirrors

refraction is the bending of a propagating wave having a shift of direction as it passes through different media; usually seen in lenses to magnify or lessen

1) passes through a prism

2) moves from one medium to another

3) seen in lenses