Page 9 - Kindergarten.indd

CONTROLLED EXPERIMENT - RESPONSE FORM

RIVER EROSION - SC.7.E.7.2

Student Name: _____________________________________
Date: __________________

TITLE RIVER EROSION
PROBLEM
What affect does the force of a flowing river have on the surrounding land?
STATEMENT
If a river runs through an area of surrounding land, then the land will

HYPOTHESIS (decrease/stay the same/increase) in size.
circle one

CONTROL INDEPENDENT (TEST) VARIABLE DEPENDENT (OUTCOME) VARIABLE NUMBER OF
TRIALS

CONSTANT

VARIABLES

 four – medium sized aluminum pans
MATERIALS  backyard soil
 one – ice pick (or an object to make small holes)
 one – watering can with removable sprinkler end
 one – hand lens
 four – textbooks

Step 1: Place seven to ten small holes in the bottom of two of the aluminum pans.

Step 2: Half fill each of the two aluminum pans with backyard soil.

Step 3: Place the two additional aluminum pans (no holes) flat on the surface side by
PROCEDURES side. These two pans will be identified as the collection pans.

Step 4: Place two books flat on top of each other behind the two collection pans.

Step 5: Place the pans filled with soil inside the collection pan with the bottom resting
inside of the collection pan and the top resting on the books.

Step 6: Water the soil in the first soil tray with the sprinkler end attached to the
watering can. Water the soil at a height of at least 30 centimeters above the
pan.

Step 7: Repeat step six using the watering can without the sprinkler end.

Step 8: Measure the widest area of separation in the soil in both pans and record the
data in the table. Use a hand lens to observe the differences.

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