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Simple Kids Crafts is a video blog dedicated to reviving the old art of handicrafts for people of all ages. How do oil spills affect aquatic plants? A Miniature Solar Panel Fire Water Balloon Make Clouds in a Bottle Secret Messages Make a Rocket Make a Hovercraft Make an Anemometer Make a Sundial Make a Radio Make an Electroscope Make a Stethoscope Make a Telescope Make a Periscope Make a Camera Bending a stream of water with a comb Lighting a bulb without electricity Simple Motor Cotton Ball Rocks? Salt-Absorbing Art and Science Color Changing Glue Art Baking Soda Clay Oil Sun Catcher Grow a Pineapple Plant! Bead Bowls Wow, what an Air-Gun Funny Diver ! Water boils without fire Ice with Boiling Water Water that boils instantly Water boils in a Paper Pot Soap-driven Boat Pulse Moves Pin Pretty Garden—without Plants Picture made by Fire Magic Pictures Dancing Doll Smoke Goes Down The Dancing Coupl The Umbrella Dance Magic Butterfly Colorful

Landslides

Objectives/Goals

The objective of my experiment was to determine which type of soil (sand, clay or sandy clay mixture) takes the least amount of water to landslide. 

I believe that sand would take the least amount of water to become unstable because it is has less strength than clay or clayey soils. 

Methods/Materials 

Materials: 

Stream table, sprinkling can, graduated cylinder, tare pan, water, soil, paper towels, scale, 30/60/90 triangle 

Method: 

1. Measure 1360.8 grams (3.0 lbs) of soil being studied 

2 Add the measured soil to the 74-1/2 inch stream table. Add the soil to the middle third of the stream table (between 24 and 48 inches) 

3. Tilt the stream table to an angle of 30 degrees from horizontal 

4. Add water from a sprinkling can, 200ml at a time, at a constant rate, until the soil mass moves. Record amount of water added. 

5. Wipe the stream table dry and repeat steps 1-4 two more times. 

6. Repeat steps 1-5 with different soil. 

Results

My results show that the sand took 1st place at an average of 600 ml of water to become unstable (landslide). 

Next was the mixture of sand and clay in 2nd place, averaging 1,000 ml to become unstable. And in last place was the clay. It took an average of 11,133 ml to become unstable.

Conclusions/Discussion

 The results of my experiment confirmed that sand takes the least amount of water to cause a landslide. This outcome agrees with my hypothesis.

The clay adds strength to the soil so the more clay that was in the soil, the more water it took to move it. This is because the clay does not absorb water as much as sand does.

I was surprised at how much more water was needed to make the clay move.

The sandy clay sample required about 40% more water than the sand to slide. However the clay sample with no sand required over 10 times more water to move than the clay sample containing sand!

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