Recent Activity

• Answered a Question in Science

  When humans breathe in air, most of the time it is through the nose, though we can also breathe in through our mouths. Assuming air...

• Answered a Question in Science

  In any scientific experiment, the independent variable is the one the experimenter changes. The dependent variable is the one measured...

• Answered a Question in Science

  Elodea is a water plant--the entire plant, including its leaves, grows under water. It is easy to maintain and is grown in many home...

• Answered a Question in Science

  There is a difference between distance traveled and displacement. Distance means the total length of travel of an object, while...

• Answered a Question in Science

  When the sun's energy strikes the earth, plants can capture some through the process of photosynthesis. Plants are then eaten by first...

• Answered a Question in Science

  This would seem to be a simple question to answer, but in some ways we know more about the surface of the moon than we do about the...

• Answered a Question in Science

  Technically, a predator-prey relationship is one type of symbiosis. Symbiosis is any type of interaction between two different species...

• Answered a Question in Science

  The reaction that causes bubbles to form in muffins is a chemical reaction, not a physical reaction. Bubble/gas formation is one sign...

• Answered a Question in Science

  Although each can be further sub-divided, the three major layers of the Earth are the crust, the mantle, and the core. Although I...

• Answered a Question in Science

  It is very frustrating to study for a test, think you know the material, and then be unable to recall the information. Teachers will...