Sunday, February 21, 2010

Expierment 2- See plants drinking


You start with 4 glass containers and pour a little water and food coloring in each glass.

Next you will need several white flowers. Trim the stems of each flower.


Place a flower in each glass of colored water and wait.


After 48 hours, this is the flower placed in red water. It has red edges!


This is the flower in the blue water.


This is the flower in the green water.

Friday, February 19, 2010

How is the water absorbed into plants?


How is the water absorbed into plants?
Plants absorb water from their root hairs on the root and send it to the other parts of the organism for food and growth enrichment. This process involves the undirectional flow of water from roots to shoots against gravitational pull. If the roots of a plant are cut and dipped in water, similiar to what I did in the experiment, the plant still absorbs the water. This pull is mainly caused due to a force called "transpirational pull." Transpirational pull is the main phenomenon driving the flow of water in the xylem tissues of plants. It results ultimately from the evaporation of water from the surfaces of cells in the interior leaves.


For another view of this experiment: Click Here> Ashley

Standards For Experiment #2: Click Here

Sunday, February 14, 2010

Experiment 1- Build a wheelbarrow


To build the wheelbarrow you will need: a shoebox, scissors, card for seperator, tape, spool, short pencil, two pieces of wood for handles, a plastic bag, and some small stones.

After you have your wheelbarrow built, you should place the stones in the bag.

Place the bag of stones in the back of the barrow and try to lift it. You will see that is is easier to lift in the barrow.

Now place the stones in the front of the barrow. You will now see that it is even easier to lift and you use less effort than before. This is because you transfer the weight of the rocks to the wheelbarrow which acts as a "lever" and increases the force you use to move things.

Machines and How they Make our Life Easier


The wheel and axle is a very popular simple machine. It looks like a kind of lever. The wheel and axle is a simple machine made of a large wheel secured to a smaller wheel which is called an axle.
One of the most common wheel and axles is something that most people use everyday. It is the tire of a car or truck. On most of these, the wheel and axle acts as a lever rotating around the fulcrum or the center point. On doing this the wheel rolls.
A wheel and axle is made up of a few objects. In the picture the small rod which is the axle, is stuck rigidly to a large wheel, which is the fan blades, so that when the rod that is stuck to the wheel turns, the wheel would also turn.
The wheel is probably the single most important invention of all time. The oldest wheel was found in a place that is now called Mesopotamia. It is believed to be over fifty-five hundred years old. Before that time, people did not have wheels to move heavy objects.
For more information on how machines help us> Click Here
Fun Word Search> Click Here

Lesson Plan/Webquest


Standards for grade 5: View Here