capillary action by RW4DRZ

VIEWS: 0 PAGES: 1

									                     Little Learners’ Lab
                                          Capillary Action
Hypothesis

Plants get their nutrients the same way some of use drink juice,
through a straw!
Supplies:

>>Cup or test tubes     >>Water
>>Magnifying glass
>>Water color           >>Coffee filter

Procedure:

    1. Before you start, discuss water and gravity. What is gravity? (Forces of attraction, like the earth
       pulling you down so you don’t fly away!) Can water flow up or just down?
    2. Fill a small container/test tube with water color/food dye mixed with water.
    3. Give each child a coffee filter and instruct them to dip just the bottom edge of it into the water.
    4. Using your magnifying glass, observe what happens to the water.

Questions:

   1. What direction is the color moving?
   2. How is it going up? Is something pulling or pushing it? (Tiny drops of water are attracted to
      the porous surface of the coffee filter. It’s like the water is pulling itself up!)
   3. Where would water move up using this scientific principle?


Notes:                                                       Learning Outcomes:

>> Capillarity is the physical process by which a liquid     >> Students learn properties of materials can
flows when it comes in contact with a particular solid       be observed, measured, and predicted. K-
surface.                                                     Physical Sciences

>>The water moves up the tiny spaces in the fibers           >> Scientific progress is made by asking
because the adhesive force between the water and             meaningful questions and conducting careful
the coffee filter is stronger than the cohesive force of     investigations. K-Investigation and
the water on its own.                                        Experimentation

>> Cohesive force exists between similar molecules           >>Students collect information about objects
                                                             and events in their environment. K-
    Adhesive force exists between unlike molecules           Statistics, Data Analysis, and Probability.

                                                             From: California’s Science Content
                                                             Standards

								
To top