Edgar is stranded on an island surrounded by an ocean of salt water. He is thirsty, but he knows that it is a bad idea to drink salt water. How could Edgar separate the salt out of the salt-water mixture?
A.
use chromatography
B.
pour the mixture through a screen
C.
evaporate off the water
D.
use a magnet to attract the salt

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

Areaction in which products can react to re-form reactants is

You exhale co2 which is produced during cellular respiration.  co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid.  the more physical activity you engage in, the more co2 your body is producing.  you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw.  can you see a change in the color of the indicator?