Science Study Guide

                                    SCIENCE WATER VAPOR TEST: FRIDAY, April 13, 2012

·         Evaporation can occur at any temperature, but it happens faster at higher temperatures

·         Dew and frost are similar because they both condense from water vapor in the air

·         Dew and frost are different because dew is a liquid and frost is a solid (ice)

·         You can turn liquid water into water vapor faster by:

o   Transferring energy to the water

o   Increasing the surface area of the water

o   Heating the water

·         Warm air holds more water vapor than cool air

·         An independent variable in an experiment is what you are trying to test. It is different in the experiment. For example, we did an experiment on evaporation and surface area was different for boxes 1-4. Surface area was the independent variable in this experiment.

·         Controlled variables are the same for all parts of the experiment. For example, boxes 1-4 were put in the same location and had the same amount of liquid. These were the controlled variables in the surface area experiment.

·         The larger the surface area (bigger surface or more water is exposed to the air), the faster the water will evaporate.

·         Materials dry faster when there is more air movement and a higher temperature.